0910 s3 chem revision
TRANSCRIPT
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Revision Exercise on Revision Exercise on Structures & PropertiesStructures & Properties
S3 Chemistry
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Bonding StructureBonding Structure
1. What is the bonding structure of the compound/element formed by :
a) Sodium Atoms
b) Chlorine and Potassium
c) Carbon and Oxygen
d) Carbon (in form of diamond)
Giant Metallic Structure
Giant Ionic Structure
Simple Molecular Structure
Giant Covalent Structure
(Metal ←→Metal)
(Metal ←→Non-metal)
(Non-metal ←→Non-metal)
(Non-metal ←→Non-metal)
Van der Waal’s Attraction between molecules
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Bonding Structure ComparisonBonding Structure Comparison
StructureGiant Ionic Structure
Giant Metallic Structure
Giant Covalent Structure
Simple Molecular Structure
Attraction betweenMetal and Nonmetal
Metal and Metal
Nonmetal and Nonmetal
Nonmetal and Nonmetal
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Melting point / Boiling pointMelting point / Boiling point
2. Map the compound/element to their melting point & boiling point.
Sodium 3550 oC /4827 oCPotassium chloride 98oC/883oC
Carbon Dioxide - 78 oC / - 57 oC
Diamond 770 oC /1420 oC
Strong bond / Giant metallic structure
Strong bond / Giant ionic structure
Weak Van Der Waal’s Attraction
Strong bond / Giant covalent structure
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Melting point / Boiling point Melting point / Boiling point ComparisonComparison
StructureGiant Ionic Structure
Giant Metallic Structure
Giant Covalent Structure
Simple Molecular Structure
Attraction betweenMetal and Nonmetal
Metal and Metal
Nonmetal and Nonmetal
Nonmetal and Nonmetal
AttractionStrong Ionic Bondbetween the ions
Strong Metallic Bond
between the positive ions and mobile electrons
Strong Covalent Bond
between the atoms
Intramolecular Strong Covalent Bondbetween the atoms.
Intermolecular Weak Van Der Waal’s Attraction
between the molecules.Melting point/ boiling
pointHigh High Very High Low
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StateState
3. What are the states of the following substances ?
Sodium
Potassium Chloride
Carbon Dioxide
Diamond
(Solid)
(Solid)
(Gas)
(Solid)
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State ComparisonState Comparison
StructureGiant Ionic Structure
Giant Metallic Structure
Giant Covalent Structure
Simple Molecular Structure
Attraction betweenMetal and Nonmetal
Metal and Metal
Nonmetal and Nonmetal
Nonmetal and Nonmetal
AttractionStrong Ionic Bondbetween the ions
Strong Metallic Bond
between the positive ions and mobile electrons
Strong Covalent Bond
between the atoms
Intramolecular Strong Covalent Bondbetween the atoms.
Intermolecular Weak Van Der Waal’s Attraction
between the molecules.Melting point/ boiling
pointHigh High Very High Low
State at room temperature and pressure
Solid Solid Solid Gas/Liquid
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Electrical ConductivityElectrical Conductivity
4. Estimate the electrical conductivity of the following substance
Sodium Good / Poor Because
Potassium Chloride
Good / Poor ( ) Because
Carbon Dioxide Good / Poor( ) Because
Diamond Good / Poor( ) Because
Solid / Liquid
Molten
Any
Any
it has mobile electrons
it has mobile ions
it doesn’t have mobile eletrons/ions
it is a gas
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Conductivity ComparisonConductivity Comparison
StructureGiant Ionic Structure
Giant Metallic Structure
Giant Covalent Structure
Simple Molecular Structure
Attraction betweenMetal and Nonmetal
Metal and Metal
Nonmetal and Nonmetal
Nonmetal and Nonmetal
AttractionStrong Ionic Bondbetween the ions
Strong Metallic Bond
between the positive ions and mobile electrons
Strong Covalent Bond
between the atoms
Intramolecular Strong Covalent Bondbetween the atoms.
Intermolecular Weak Van Der Waal’s Attraction
between the molecules.Melting point/ boiling
pointHigh High Very High Low
State at room temperature and pressure
Solid Solid Solid Gas/Liquid
Electrical Conductivity
Good in molten state
Because it has mobile ions
Good in Solid or Liquid
Because it has mobile
electrons
PoorBecause it doesn’t
have mobile ions/electrons
Except graphite
PoorBecause it doesn’t have mobile ions/electrons
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SolubilitySolubility
5. What are the solubility of the following substances ?
Sodium
Potassium Chloride
Carbon Dioxide
Diamond
(Insoluble)
(Soluble)
(Insoluble)
(Insoluble)
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Solubility ComparisonSolubility Comparison
StructureGiant Ionic Structure
Giant Metallic Structure
Giant Covalent Structure
Simple Molecular Structure
Attraction betweenMetal and Nonmetal
Metal and Metal
Nonmetal and Nonmetal
Nonmetal and Nonmetal
AttractionStrong Ionic Bondbetween the ions
Strong Metallic Bond
between the positive ions and mobile electrons
Strong Covalent Bond
between the atoms
Intramolecular Strong Covalent Bondbetween the atoms.
Intermolecular Weak Van Der Waal’s Attraction
between the molecules.Melting point/ boiling
pointHigh High Very High Low
State at room temperature and pressure
Solid Solid Solid Gas/Liquid
Electrical Conductivity
Good in molten state
Because it has mobile ions
Good in Solid or Liquid
Because it has mobile
electrons
PoorBecause it doesn’t
have mobile ions/electrons
Except graphite
PoorBecause it doesn’t have mobile ions/electrons
Solubility Soluble Insoluble Insoluble Insoluble
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Integrated Question Integrated Question (Predict Structure)(Predict Structure)
a) What is the bonding structure of A ? Explain.
b) What is the bonding structure of B ? Explain.
c) What is the bonding structure of C ? Explain.
d) What is the bonding structure of D ? Explain.
Substance Melting point (oC)
Boiling point (oC)
Electrical ConductivitySolubility
Solid state Molten state
A 130 450 Good Good Insoluble
B 690 1790 Poor Good Soluble
C 1470 3420 Poor Poor Insoluble
D -99 -25 Poor Poor Insoluble
Giant Metallic Structure. Good Electrical Conductivity in Solid/Molten
Giant Ionic Structure. Good Conductivity in Molten & Soluble
Giant Covalent Structure. Poor Conductivity, Insoluble & high m.p./b.p.
Simple Molecular Structure. Low m.p./b.p., poor conductivity & insoluble
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Integrated Question Integrated Question (Predict Properties)(Predict Properties)
a) Predict the state of each elements.b) Two compounds, one is formed by W and X and
another is formed by X and Z. Which one will soluble in water ? Explain it in details.
c) By considering all the substances above including the compounds in (b),
◦ Which one is the most hardness? Why?◦ Which one is not reactive? Why?◦ Which one is toxic? Why?◦ Which of them can conduct electricity? Why?
Element W X Y Z
Atomic number 6 9 10 11
2,4
Carbon
2,7
Florine
2,8
Neon
2,8,1
Sodium
ZX. Ionic Compound
W. Z is soft, X and Y are gases
Y . Octet structure, noble gasX. Group 7 are toxic.
Z, it is metal and ZX conduct in molten state
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Essay Type QuestionEssay Type Question
MgO, SiO2, SO2 are oxides of Period 3 elements in the Periodic Table.
Discuss how the melting points of these oxides are related to their bonding and structure.
MgOMetal ,Non-metal
Ionic BondGiant ionic structure
SiO2
Non-metal, Non-metalCovalent Bond
Giant covalent structure
SO2
Non-metal, Non-metalCovalent Bond
Van der Waal’s AttractionSimple molecular structure
SiO2>MgO>SO2
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SummarySummary
StructureGiant Ionic Structure
Giant Metallic Structure
Giant Covalent Structure
Simple Molecular Structure
Attraction betweenMetal and Nonmetal
Metal and Metal
Nonmetal and Nonmetal
Nonmetal and Nonmetal
AttractionStrong Ionic Bondbetween the ions
Strong Metallic Bond
between the positive ions and mobile electrons
Strong Covalent Bond
between the atoms
Intramolecular Strong Covalent Bondbetween the atoms.
Intermolecular Weak Van Der Waal’s Attraction
between the molecules.Melting point/ boiling
pointHigh High Very High Low
State at room temperature and pressure
Solid Solid Solid Gas/Liquid
Electrical Conductivity
Good in molten state
Because it has mobile ions
Good in Solid or Liquid
Because it has mobile
electrons
PoorBecause it doesn’t
have mobile ions/electrons
Except graphite
PoorBecause it doesn’t have mobile ions/electrons
Solubility Soluble Insoluble Insoluble Insoluble
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The EndThe End