e-review geas modules 7-11.pdf

7/30/2019 E-Review GEAS Modules 7-11.pdf

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GEAS Module 7

# Answers Questions1 chemical reaction what is another term for chemical change2 extensive properties the properties of a material that changes when the amount of substance changes are called

3 henri becquerelthe discovery of radioactivity further confirms the existence of subatomic particles. Whodiscovered radioactivity

4 AMU what is the common unit used to indicate the mass of the particle5 5.929709x10^-24 what is the mass of proton in grams6 neutron the number of ___ dtermines the number of isotopes of an element7 group IIIA the boron group s what group in the periodic table8 oxygen what is the most abundant elemwnt in terms of the number of atoms9 oxygen what is the most abundant element in the body

10 berryllium all alkali metal will tarnish except11 nitrogen what is the most abundant element in the atmosphere

12 aufbau principlewhat principle states that electron fill the orbitals, one at a time, starting with the lowestenergy orbital then proceeding to the one with higher energy

13 liquid water has a biggest density when it is in what state?

14 ionicwhat type of bond occurs when the difference in electronegativity is greater than or equalto 2

15 seawater what is the most common solution on earth16 candela what is the SI unit of luminous intensity17 100000 how many dynes are there in 1 newton18 lumens what is the unit of luminous flux19 potential energy what is the enrgy something posseses by virtue of its position20 kinetic energy what is conserved in an elastic collision21 1 what is the coefficient of restitution for a perfectly elastic collision22 0 what is the coefficient of restitution for a perfectly inelastic collision23 moment of inertia and angular speed angular momentum is a product of

24 conservation of angular momentumwhen the sum of external torques acting on the system of particles is zero, the total angularmomentum remains constant

25 weight density what is define as weight per unit volume26 divergent lens what lens is commonly used to correct nearsightedness


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27 translational energythe molecules of gas moving through space with some velocity posseses what kind of energy

28 gage pressure the difference between the absolute pressure and the atmosphere pressure is called29 4.184 one calorie is equivalent to how many joules

30 heat capacity what refers to the amount of heat needed to raise the temperature of an object by onedegree celsius or 1k31 saturated vapor a vapor is about to condense is called___32 reduce energy a pulley is used to move objects except to

33 convectionwhat refers to the transfer of energy between a solid surface and the adjacent fluid that isin motion

34 kirchoffs radiation lawwhat states that for any two bodies in thermal equilibrium, the ratios of emissive power toabsorptivity are equal

35 couple what refers to a pair of equal, opposite and parallel forces36 ferromagnetic material what type of materials behave like iron when placed in amgnetic field37 hardness what mechanical property of a material refers to the resistance to plastic deformation38 200% by definition, a rubber is a substance that hasat least ___ elongation in tensile stress

39 proprtional limitthe greatest stress which a material is capable of withstanding without a deviation fromacceptable of stress to strain is called

40 diamagnetic which of the following has a permeability slightly less than that of free space41 paramagnetic what material has permeability slighly greater than that of free space

42to inc dynamic and high temperaturestrength and hardness what is the purpose of molybdenum in steel alloying

43 nichromewhat combination of elements has high electrical resistance, high corrosion resistance andhigh strength at red heat temperatures making it useful in resistance heating

44

to reduce hardness by combining withsulfur below 0.5% and increase hardnessabove 0.5% what is the effect of manganese in cast iron

45 to deoxidize molten cast iron what is the effect of aluminum in cast iron46 muntz metal what is the most common beta brass with a composition of 60% copper and 40% zinc47 500 to 10 000 what is the typical dielectric constant of class II capacitor

48 law of supply and demandunder condition of perfect competition, the price at which any given product will besupplied and purchased is the price that will result in the supply and demand being equal

49 coupon bond a type of bond to which are attached coupons indicating the interest due and the date


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when such interest is to be paid is called50 callable bond what type of bondwhich can be redeemed befor maturitydate51 callability what is the feature of some bonds whereby the issuer can redeem it before it matures

52 fair value

what refers to the value of assets which is disinterested third party, different from the

buyer and seller, will determine in order to establish a price acceptable to both parties53 corporation double taxation is a disadvantage of which business organization54 liquid assets what is another term for current assets55 profit margin ratio the ratio of net income before taxes to net sales is called56 staffing what management function involves selecting candidate and training personnel

57 directingwhat management function involves orienting personnel in the most effective way andchanneling resource

58 top management level strategic plannning is undertaken in which management level

59little managerial control and high degree of risk what is the disadvantage of free rein style of leadership

60 ad hoc committee what type of committee companies or corporations created for a short term purpose only

61 GMPCSwhat is a new regulation issued by the NTC providing the guidelines for mobile personalcommunication having a global coverage using satellite

62 9PM radio programs not siutable for children must be aired after what time63 6AM to 8PM what is the prime time block for FM radio for provincial stations64 50kw what is the maximum power allocation for AM boradcast in Metro Manila65 45mins KBP radio Code requires each station a minimum of ___news per day66 15 In Metro Manila, commercial load shall not exceed___ minutes for 1 hour program67 41.25MHZ what is the standard IF sound carrier for a cable TV system68 45.75Mhz what is the standard IFvideo carrier for a cable TV system69 class C In Metro Manila, Am radio with airtime from 9PM to 12 midnight is

70 10authorized gateway operators shall provide at least one rural exchange line for every___urban local exchange lines

71 ITU T which body in the present ITU structure took the place of CCITT72 council where does secretary general in the organization structure of present ITU report

73 logwhat refers to the listing of dates and time events, programs, equips,test etc incommunication system

74 direction finderat what postion does a maritime ship main antenna have, when it is open circuited and thatany auxilliary antenna is/are connected to the main receiver


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75 April 17 2004 when was RA 9292 approved by Pres GMA76 August 31 2004 when was the IRR of the RA 9292

77 1500phpunder RA 9292, the rate of retainers' fee to be charged by the consulting electronicsengineer for routine or ordinary consultation will not be less than___ per month

78 milliroentgen per hour what unit measures the dosage rate of radiation

79 sleevewhich part of the housing of a building cable system has the same function as the slot butcircular in shpe

80 integrity which of the following doesnt constitute the foundation of ethics81 morality ethics is synonymous to

82 a representationwhat refers to the statement of fact made by one party to the ather before the contract ismade

83 tortwhat is a civil wrong commited by a person casuing a damage to other person of hisproperty,emoitonal well being or reputation

84 chemical reaction what is another term for chemical change85 extensive properties the properties of a material that changes when the amount of substance changes are called

86 henri becquerelthe discovery of radioactivity further confirms the existence of subatomic particles. Whodiscovered radioactivity

GEAS Module 8

# Answers Questions1 Carbon unique element2 Chemical energy potential energy3 Oxygen most abundant in body4 Water dihydrogen monoxide5 Law of definite proportion masses same proportion6 Second law of thermodynamics energy has quality and quantity7 Fowler zeroth law8 Variable varying value9 Waviness wave like variation

10 Dispersion one beam split to several11 Beryllium x-ray12 x-ray high frequency electromagnetic waves


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13 gray body constant emissivity14 1 black body absorptivity15 Stick together perfectly inelastic16 Jointly with the colliding bodies coefficient of restitution

17 5am to 9am, 4pm to 8pm am primetime metro manila18 Am with 5k carrier requires ece supervision19 1 rbe radio transmitter20 15 years maximum term CATV21 15 days exam result within22 March 21, 1995 RA 792523 RA 8792 electronic commerce 200024 3396 maritime communications law25 467 international communication satellite26 Amplitude deflection of tuning fork

27 Frequency number of cycles28 Period time required to (alam mo na yun)29 Hardness resist plastic deformation30 Period row periodic table31 10mm ball brinell strength test32 Half force twice length of the string33 4 x force twice the velocity34 Blue light photon highest energy35 Equity residual value of companys asset36 Sunk cost unrecovered depreciation

37 Angular magnification in telescope ratio of angle subtended by the eye38 Mass number isotope whole number

39Same number of electrons and protons,different number of neutrons isotope

40 Mechanical energy rotational motion41 Rotational kinetic energy electron revolving around the nucleus42 Process from equilibrium state to another equilibrium state43 Isolated no energy can enter/exit44 Equatio numbers and units both sides equal


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45 Lux unit of illumination46 0.5-1.9 difference in electronegativity for non polar covalent bond47 Polar covalent bond unequal number of electron bonds48 Coupon proof of financial security

49 10% chromium is at least __ for stainless steel50 6 electrical resistance of stainless steel as much as __ carbon steel51 Hydries hydrogen compound52 Group VI A chalcogens53 4 quantum numbers54 4 electron dot for group IV55 Impact strength fracture a volume56 Relative Density specific gravity57 Density ratio of mass to volume58 Modulus of elasticity ratio of stress to strain

59 Cissterine ore of tin60 Daltons law of partial pressure61 Superposition sum of 62 Kelvin planck statement no heat engine 100% efficiency63 Net force acting to slow to stop a ball64 Balanced forces, zero net force constant velocity horizontal65 4185 J/kg C water66 Registered bond companys owner recorded67 Market value willing payer willing seller68 Callable bond redeem before maturity

69 Brass copper plus zinc70 Yellow Brass 30% zinc71 Index of refraction ratio of speed of light in a vacuum to speed in another medium72 Net income to equity return on investment ratio73 Heat distortion temperature temperature for a polymer to deflect74 Conduction heat transfer molecule to molecule75 Radiation transfer does not require matter76 17 minutes outside metro manila commercial less than __ in an hour program77 Measurement compare to an well agreed reference


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78 Shock wave sound produced by a body moving at a speed > speed of sound79 Beat interference is required to produce80 Perpendicular to direction transverse wave81 Receivable turnover average speed of account receivable are collected

82 Trickling (pickling) use of acid to remove oxides83 Convergent lens parallel beams to focus84 Kilogram oppose to event85 Mass not intensive property86 500g mass of half a liter of water87 Kelvin SI unit for temperature88 Heat of fusion 1kg from solid to liquid89 Molar heat of fusion 1 mole from solid to liquid90 Steady no change with time91 System to be studied

92 Conservation of charge93 Conservation of energy no energy is created nor destroyed94 Vacuum pressure below atmospheric pressure95 Galvanized steel steel coated with zinc96 Elastic modulus measure of rigidity97 Friction reduce amplitude of damped harmonic oscillator98 Tempering heating followed by cooling99 Salt Base plus acid

100 Huygens principle every point on the wavefront can be considered as a source of secondary wavelets

GEAS Module 9

# Answers Questions1 Polymers plastics2 Elastomers rubber like plastics3 Isomers same molecular formula, different structure4 Amino acid molecules protein polymers5 Cellulose not converted to blood sugar


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6 Octane 2,2,4trimethylpentene is an isomer of 7 1000 kW manila cebu channel 7 -138 7925 paging system9 April 17, 2004 9292 approved

10 436 CATV operations

11 3 yearsinternational carriers, provide local exchange service at unserved or underserved areas for ____

12 Carbonic acid less than 7pH13 Ammonia greater than 7pH14 Ions acids, base, salts, all have15 pH scale hydronium ion concentration16 Ions produced Geiger counter measures17 Time not vector18 Sand not solution

19 Molecular structure to form or not to form solutions depends20 3rd law of Thermodynamics entropy of crystalline structure21 1st law of Thermodynamics energy is a thermo property22 10g /cubic meter not density of water23 4 degree Celcius water is most dense24 Pure water ice in freezing seawater25 6 AM to 8 PM FM primetime provincial26 Law of conservation of momentum constant momentum throughout the system27 2nd law of motion product of mass and acceleration28 Fusion energy source of the sun

29 Released proton combine with neutron energy is30 Latent heat in a phase change31 Factor method unit method32 Diminishing return less than proportionate increase in output33 Debenture bond bond without security34 Straight line method computing for the depreciation, directly proportional35 Controlling determine deviation and to take corrective action36 Market system of exchange, buyers and sellers together37 Operations Management planning, organizing of operations


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38 Staff authority advice to superior39 Receivable turnover is the radio of net credit sales to average net receivables40 Profit margin the ratio of net income before taxes to net sales41 Glycol alcohol 2 hydroxyl groups

42 Plankton and algae petroleum43 Ester fats from animals, oils from plants

44Hydrogen of a polar molecule and oxygenof another polar molecule example of hydrogen bond is a weak-moderate

45 Hardenablity ability to be hardened through the core46 Gray steel high carbon iron carbon silicon alloy47 Malleable steel heated for ductility48 Bronze copper and tin49 Zinc most widely used for alloy with copper50 14% nickel alnico

512% - atleast

carbon for steel52 Tensile strength tension test53 Secant modulus stress / strain in non-linear region54 Effectiveness accomplish objectives55 100,000 Pa 1 bar56 Matrix balancing human resources57 Ilmanite ore of titanium58 Gangue earth and stones mixed with iron oxides59 Camber deviation of edge straightness60 Wavefront points where the waves from a source is in phase

61 Longitudinal wave parallel62 Thermal conductivity ability to conduct heat63 50-150 microohm resistivity resistor64 Ferromagnets high permeability65 Pascals law pressure is distributed uniformly66 Hess law the enthalpy change67 10 hydrogen alkane with 4 carbon68 2 independent variables fix the equilibrium of a gaseous69 Concave thin in the middle


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70 Linear magnification ratio of image height to object height71 Strong acid ionize completely into hydronium ions72 1.33 index of refraction of water73 Chemical equilibrium opposing reactions at the same time

74Capitalization cost

present worth infinite period75 Rem measure of radiation, considers biological effect76 Extensive properties depends on amount77 10 times more acidic 2pH to 3pH78 100,000 fine for copying copyrighted79 Condition fundamental obligation80 Machine transmits force or torque81 Ordinary annuity payment at the end of period82 Critical path method one time factor per activity83 Monopoly opposite of perfect competition

84 Luxury desires, after needs are achieved85 1weber/square meter sound intensity, damage to ear86 Quality ratio of vapor mass to mass of mixture87 Electrolyte liquid that conducts electricity88 Log list of time, dates89 Price-earnings ratio ratio of price per share to earnings per share90 Lumen/watt luminous efficiency91 Oxidize cast iron aluminum is added in cast iron to92 Ion ion force when salt is insoluble in water, strongest force is93 Illumination luminous flux per unit area

94 Steffan-boltzmann law fourth power law95 High electric current bus bars with rectangular cross section96 Privity of contract only the parties involved can sue97 Steady flow process fluid flows through a controlled volume98 Nil ductility temperature toughness is reduced to a certain value (15 x/x)99 Prime contractor hires subcontractors

100 carbon steel carbon as the main strengthening


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GEAS Module 10

# Answers Questions1 July 12, 1993 effectivity of executive order 109

2 EO 467an E.O signed by Fidel V Ramos in March 1998 providing the national policy in theoperation and use of international satellite communications in the philippines

3 Section 7 Powers and Functions of board is provided in ___ of RA 9292

4 100000, 6 months imprisonement

minumum punishment imposed to any person who shall give false and fraudulentstatement to the board to obtain a Certificate of registration and/or Professional ID card asElectronics Engineer

5 6monthsminumum penalty for unauthorized copying of copyrighted works as provided in the Ecommerce Act of the Philippines

6 ligninwood is composed of chains of cellulose molecules bonded together by another naturalpolymer called

7 1.0072765 mass of proton in amu8 1.60217733x10^-19 charge of proton in coulombs9 wave model Interference can be detected by

10 uncertainty principle

the principle that states about the fundamental limitation that, for a particle as small aselectron, one cannot know exactly where it is and at the same time know its energy or howit is moving

11 current ratio index of short term paying ability12 profit margin the ratio of net income before taxes to net sales is called13 set goals if you are appointed as division manager, your first task is most likely to___

14 project managementcollection of tolls and techniques that are used on a predefined set of inputs to produce apredefined set of outputs

15 steelwhat is defined as an alloy of iron and carbon, with the carbon being restrcited withincertain concentration limit

16 radon 222 polonium17 lead radioactive series ends when element decayed to18 platinum which of the following has higher holding capabilities19 increase atomic size________from top to bottom20 magnesium which of the following is not an alloy21 20.9 oxygen composition of dry air22 solvent nitrogen in air is a____


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23 4% percentage of salt with salinity of 40%24 mixed with 100mL of water 40% vodka means25 increase decrease the cold cathode26 wavelength and velocity changes when light strikes a medium27 pitch ____ is a measure of frequency28 0.05 500ppm29 group 5A what group is nitrogen30 groups and families columns in periodic table is called31 astatine 210 which of the following is radioactive32 7 years terms of board according to RA 929233 64 switching constant34 16dB min loss of head end processor of cable tv35 white iron which cast iron is hard and wear resistant36 soft iron electromagnet is made of 37 isotonic if two solution have the same concentration of solute they are__38 isomers different phase and chemical properties39 aluminum metal where sound travel fastest in ____40 rad unit of radiation41 temperature what is the difference between the light radiated in bulbs, sun and candle

42pair of electrons for which each atom areshared covalent bonding

43 atom building block of engineering material44 bohr model electron model that shows that atoms jump from one orbit lower45 MPD=5(n-18) formula that gives accumulated permissible dose in rems for the whole body

46 deflationreduction in the level of national income and output usually accompanied by a fall in thegeneral price level

47 riser terminala terminal where riser cable pairs are terminated in order to serve a portion or an entirefloor of a building

48 spin quantum how electrons occupy the same state49 peltier effect heat is produce between 2 conductors50 magnetic field is opposite when current change direction51 increase increase in wavelength and frequency52 diamagnetic has negative permeability


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53 large susceptance farramagnetic has___

54 punitive damgetype of damage is awarded, usually for fraud cases to ounish, make an exampleof thedefendant to defer other by doing the same thing

55 material breachdefined as nonperformance that results in the injured party receiving somethingsubstantially less than or different from what contract is intended

56 contract what is defined a legally binding agreement or promise to exchange goods or services57 zero change in internal energy is__58 rotational equilibrium when net torque acting on an object is zero59 fluxmeter which of the following measures magnetic field60 a small scale phenomenon light can be describe as___61 intensive property not dependent on the quantity of the substance62 chemical energy change in all properties is called___63 density which of the following is not an extensive property

64because ions of salt prevent water fromforming ice why does addition of sodium chloride solidifies faster than water

65 increase in pressure increases boiling point of water66 carbon dioxide increase when water increases temperature67 acetic acid acids in vinegar is called68 1 gram 1 cu meter of eater is____

69 chromatic abberationdefect in lenses which causes unequal refraction of the different refraction of differentcolor

70 zinc element used as a coating for iron to make galvanized iron a corrosion-resistant material

71 1000 to 2200according to the medium frequency broadcast standards, the term nighttime refers to theperiod f time in ___ UTC

72 moral dilemmasrefers to the situation in which moral reasons comes into conflict, or in which theapplication of moral values is problematic

73 July 12 1993 effectivity of executive order 109

74 EO 467an E.O signed by Fidel V Ramos in March 1998 providing the national policy in theoperation and use of international satellite communications in the philippines

75 Section 7 Powers and Functions of board is provided in ___ of RA 9292

76 100000, 6 months imprisonement

minumum punishment imposed to any person who shall give false and fraudulentstatement to the board to obtain a Certificate of registration and/or Professional ID card asElectronics Engineer


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77 Increases atomic size of the elements in a group when you go from top to bottom of the group78 sublimation changing solid state to gas state79 Jointly to the colliding objects coefficient of restitution80 Archimedes principle the theorem used in hydrometers

81transverse wave occur when the individual particles of a medium vibrate from side to side perpendicular to

the direction in which the waves travel82 trasverse wave determines the polarization of the wave83 frequency used in determining the pitch of a sound84 Water has greater bulk modulus than air reason why sound travels faster in water than in air85 Aperture angular opening of a sphere that encloses the mirror86 Four colors a hydrogen element can produce87 humidity hydrometer measurement represents88 Diffused reflection reason why light cant pass through the leaves of trees

89diffraction reason why light cant produce shadow through a pinhole

90 saturated when there are salt particles at the bottom of a container with water91 any method to produce luminous light92 zero the energy consumed in a cyclic process93 increase the solubility of carbon dioxide as the temperature of water decreases94 isomers different chemical and different physical properties

95One pair of electron, one from each atom isshared

covalent bonding

96 atoms building blocks for engineering materials97 4 ____ power of absolute temperature98 1100 to 2200 period of time referred as nighttime (in UTC)

9964 international switch termination refers to a port in the switching international gateway

system equivalent to ___ kbps(digital ) where the international circuit terminates100 6 months imprisonment minimum penalty for unauthorized copyright


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GEAS Module 11

# Answers Questions1 Protons and neutrons found in the nucleus of an atom2 Electron negatively charged particle of an atom3 Proton positively charged particle of an atom4 Neutron particle of an atom that has no electrical charge5 Quarks the fundamental particles6 Indivisible atomos7 John Dalton first person to propose the atoms have weights8 James Chadwick discovered the neutron9 Matter anything that occupies space and has mass

10 Atom building blocks of all forms of matter11 Elements or compounds classification of substances12 Element cannot be broken down into smaller substances13 Compound result from the combination, in definite proportion of mass, of two or more elements14 Solution sugar dispersed in water15 Solid, liquid, gas three states of matter16 Acids or bases classification of compounds17 Metals are neither malleable nor ductile not properties of metals18 Hydrochloric acid and sodium hydroxide needed for the formation of table salt or sodium chloride19 Heterogeneous composition and properties are not uniform throughout20 Surface area not an intensity property of a material21 Law of multiple proportion22 Law of definite proportion23 Pauli exclusion principle no two electron in the same atom can have the same set of four quantum numbers24 Grahams law of effusion states that the rate of effusion25 JJ Thompson raisin bread model26 Plum-pudding model JJ Thompson27 Charge unit charge of a particle28 5.485799x mass of electron in amu29 Ion atom of an isotope30 Ion electrons are removed from or added to a neutral atom


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31 Anion negatively charged ion32 Cation positively charged ion

33Julius Lothar Meyer And Demitri IvanovichMendeleev periodic law

34 Alkaline earth metals elements in group II A35 Group 0 or IIIA noble gases36 Antimony not a noble gas37 8 atomic number of oxygen38 32 atomic number of germanium39 6 atomic number of carbon40 Carbon second most abundant element in the human body41 Potassium perchlorate explosives and fireworks42 Beryllium the alkaline metal that doesnt tarnish43 Promethium electric power source for pacemakers and artificial hearts44 Neon used in advertising ads45 Electron configuration of an atom describes how the electrons are distributed among the orbitals46 Quantum mechanical model describes atoms as having a nucleus at the center around which electrons move47 Valence shells main energy level where the valence electrons belong48 Representatives main group of elements

49The rightmost digit of the group number of the element the number of valence electrons for representative elements

50 The group number the number of valence electrons for transition elements

51The region of space occupied by itselectrons size of an atom

52 Albert Einstein first predicted Bose-Einstein Condensate (BEC)53 Electron affinity measure of the atoms tendency to attract an additional electron54 Electronegativity ability of the atom to attract an additional electron55 Ion result of the process of gaining or losing an electron

56Plasma and Bose-Einstein Condensate(BEC) two other state of matter

57 BEC made of gas atoms that have been cooled58 1995 year where the first Bose-Einstein Condensate (BEC) was created59 Plasma high energy, electrically charged gas produced by heating


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60 0 degree Celcius temperature of water in solid state at 1 atmosphere61 4 degree Celcius water is densest62 Tungsten element has a very high melting point and ideal for filaments of light bulbs63 Ductility metals can be drawn into wires64 Iron and carbon components of steel65 Ionic bond electrostatic attraction

66 Octet rulestates that atoms tend to gain, lose or share electrons until they are surrounded by eightvalence electrons

67 Electron dot structure or lewis structureindicates the number of valence electrons in the atom represented by dots scattered onfour sides of the atomic symbol

68 Covalent bond sharing of electrons69 Lewis Acid70 Bond length distance between the nuclei of two bonded atoms71 Bond distance and bond angle describes the overall shape of a molecule72 Bond angle angle made by the lines joining the nuclei of the atoms in the molecule

73Valence-shell electron-pair repulsiontheorem

repulsion

74Valence bond theory overlap of atomicorbitals

75When the centers of positive and negativecharge do not coincide

molecule is polar

76 Molecular mass sum of masses of the atoms in the molecule77 Avogadros number 12 grams of carbon 1278 6.02x avogadros number79 Mole amount of substance that contains 6.02x 10 particles of that substance80 Molar mass mass in grams of one mole of a substance81 Grams per mole unit of molar mass82 78.1% nitrogen composition in dry air83 0.03% carbon dioxide composition in dry air84 Diffusion mixing of gases85 Effusion passage of molecules of a gas from one container to another through a tiny opening86 Vaporization liquid state to gas state87 Feels slippery not a property of acids


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88 Reacts with metal to form salt not a property of base89 Bond 10 years and guaranteed a mortage90 Photonics study of light91 Buyer or consumer basic consuming or demanding unit of a commodity

e-review geas modules 7-11.pdf

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