chemistry grade 9/10 review. outline what is chemistry? so what? classification of matter properties...
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Chemistry Chemistry Grade 9/10 ReviewGrade 9/10 Review
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OutlineOutline
What is Chemistry?What is Chemistry?So What?So What?Classification of MatterClassification of MatterProperties of MatterProperties of MatterElementsElementsPeriodsPeriodsChemical FamiliesChemical FamiliesMetals & Non-MetalsMetals & Non-MetalsSubatomic ParticlesSubatomic Particles
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What is Chemistry?What is Chemistry?
Chemistry is the study of Chemistry is the study of mattermatter, its , its propertiesproperties, changes and , changes and transformations.transformations.
MatterMatter - is anything that has a - is anything that has a mass and takes up space.mass and takes up space.
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So What?So What?
Chemistry is part of our everyday Chemistry is part of our everyday lives.lives.
The products of chemical processes The products of chemical processes and reactions are involved in all and reactions are involved in all aspects of our lives:aspects of our lives:– The clothes we wearThe clothes we wear– The food we eatThe food we eat– The places we live and workThe places we live and work
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Classifying MatterClassifying Matter
Matter is classified as either pure Matter is classified as either pure substances or mixtures.substances or mixtures.
Matter
Pure Substances Mixtures
Elements Compounds SolutionsHeterogeneous
Mixtures
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Pure SubstancesPure Substances
Pure SubstancesPure Substances - contain only - contain only oneone kind kind of of particleparticle. .
ElementsElements - - are pure substances that are pure substances that cannocannot be t be broken downbroken down into simpler into simpler substances. (eg. gold)substances. (eg. gold)
CompoundsCompounds - contain - contain two or more two or more elementselements in fixed proportions. (eg. water – in fixed proportions. (eg. water – HH220, carbon dioxide – C00, carbon dioxide – C022))
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MixturesMixtures
MixturesMixtures - contain - contain twotwo or more or more pure substancespure substances..
SolutionsSolutions - have only - have only oneone visible visible component. (eg. apple juice)component. (eg. apple juice)
Heterogeneous mixturesHeterogeneous mixtures contain contain twotwo or more visible components. or more visible components. (eg. balsamic salad dressing)(eg. balsamic salad dressing)
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Properties of MatterProperties of Matter
Physical PropertiesPhysical Properties - are - are characteristicscharacteristics of a substance. of a substance.
Some physical properties of matter are:Some physical properties of matter are:– State (solid, liquid, gas)State (solid, liquid, gas)– ColourColour - Odour- Odour- Texture- Texture - Mass- Mass– VolumeVolume - Melting Point- Melting Point– Boiling PointBoiling Point
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Properties of MatterProperties of Matter
Chemical PropertiesChemical Properties - are - are characteristic characteristic behavioursbehaviours of a of a substance. substance.
Some chemical properties of matter Some chemical properties of matter are:are:– CombustibilityCombustibility– Reaction with acidsReaction with acids– FlammabilityFlammability
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ElementsElements
Elements are Elements are pure substancespure substances that that cannot be broken down into a cannot be broken down into a simpler substance. simpler substance. – Eg. Eg. gold, nickel, hydrogengold, nickel, hydrogen
Elements are grouped on the Elements are grouped on the Periodic Periodic TableTable according to according to physicalphysical and and chemicalchemical properties. properties.
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PeriodsPeriods
Elements are grouped in Elements are grouped in horizontal horizontal rowsrows called called periodsperiods..
All elements in a period have the All elements in a period have the same number of same number of atomic orbitsatomic orbits..
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Chemical FamiliesChemical Families
Elements are grouped in Elements are grouped in vertical vertical columnscolumns called called chemical familieschemical families or or GroupsGroups..
All elements in a group have the All elements in a group have the same number of electrons in their same number of electrons in their outer shell.outer shell.
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MetalsMetals
Characteristics of Metals:Characteristics of Metals:
Location on Periodic Location on Periodic TableTable
Left hand sideLeft hand side
LusterLuster ShinyShiny
MalleabilityMalleability MalleableMalleable
ConductivityConductivity Good conductorsGood conductors
State at room temp.State at room temp. Mostly solidsMostly solids
ReactivityReactivity ReactiveReactive
Tendency to lose or Tendency to lose or gain electronsgain electrons
Tend to lose electronsTend to lose electrons
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Non-MetalsNon-Metals
Characteristics of Non-Metals:Characteristics of Non-Metals:
Location on Periodic Location on Periodic TableTable
Right hand sideRight hand side
LusterLuster DullDull
MalleabilityMalleability Brittle (not malleable)Brittle (not malleable)
ConductivityConductivity Poor conductorsPoor conductors
State at room temp.State at room temp. Liquid, gas or solidLiquid, gas or solid
ReactivityReactivity ReactiveReactive
Tendency to lose or Tendency to lose or gain electronsgain electrons
Tend to gain electronsTend to gain electrons
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What it MeansWhat it Means
Melting Point (oC)Boiling Point (oC)
Atomic Radius
Density
Name of Element
Atomic Number
Symbol of Element
Atomic Mass
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Subatomic ParticlesSubatomic Particles
The nucleus is the The nucleus is the dense positivedense positive core of an core of an atomatom..
ProtonsProtons
CharacteristCharacteristicic
ProtonProton
LocationLocation Nucleus of atomNucleus of atom
ChargeCharge PositivePositive
SymbolSymbol p+p+
Relative Relative MassMass
11
CalculationCalculation # of protons = atomic # of protons = atomic numbernumber
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Subatomic ParticlesSubatomic Particles
NeutronNeutron
CharacteristiCharacteristicc
NeutronNeutron
LocationLocation Nucleus of atomNucleus of atom
ChargeCharge NeutralNeutral
SymbolSymbol nn
Relative Relative MassMass
11
CalculationCalculation # of neutrons # of neutrons
= atomic mass - # of protons= atomic mass - # of protons
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Subatomic ParticlesSubatomic Particles
ElectronsElectrons
CharacteristCharacteristicic
ElectronsElectrons
LocationLocation Circle nucleus at different Circle nucleus at different energy levelsenergy levels
ChargeCharge NegativeNegative
SymbolSymbol e-e-
Relative Relative MassMass
00
CalculationCalculation # of electrons = # of # of electrons = # of protonsprotons