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Chemistry > Chap 5: Structure and Properties of Materials > Flashcards

Chap 5: Structure and Properties of Materials Flashcards

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1
Q

What is the structure of ionic compounds?

A

Giant ionic lattice structure

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2
Q

What bonds are between giant ionic lattice structures?

A

Strong electrostatic forces of attraction between oppositely charged ions

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3
Q

What is the MP/BP for giant ionic lattice structures?

A

High as large amount of energy need to overcome strong FOA

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4
Q

What is the solubility of giant ionic lattice structures?

A

Soluble in water, insoluble in organic solvents

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5
Q

Electrical conductivity of giant ionic lattice structures?

A

Are electrical conductors only in molten or aqueous states.
(As it has charged particles and ions are free to move to conduct electricty)

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6
Q

Hardness of giant ionic lattice structures?

A

Hard due to strong FOA

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7
Q

What are the 3 types of structures in covalent bonding?

A
  • Simple moleculer/covalent structure
  • Giant covalent structures
  • Macromolecules
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8
Q

What are the bonds between simple molecular structures?

A

Weak intermolecular forces of attraction between molecules

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9
Q

MP/BP of simple molecular structures?

A

Low as small amount of energy is needed to overcome IMFOA

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10
Q

Does molecular size affect MP/BP?

A

Yes as bigger the molecular size, the more IMFOA, causing a higher MP/BP

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11
Q

What is the solubility of all the structures under covalent bonding?

A

Insoluble in water, soluble in organic solvents

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12
Q

Electrical conductivity of simple molecular structures?

A

None as there are no charged particles, regardless of state

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13
Q

Bonding between giant covalent structures?

A

Strong covalent bonds between atoms/particles

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14
Q

MP/BP of giant covalent structures?

A

High as large amount of energy needed to overcome strong covalent bonds

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15
Q

Electrical conductivity of giant covalent structures?

A

None except for graphite

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16
Q

Describe unique characteristics of diamond/silicone dioxide

A
  • It is hard due to tetrahedral structure
  • It is an electrical insulator
17
Q

Describe unique characteristics of graphite

A
  • Soft due to its hexagonal structure (weak van der Waal’s FOA)
  • the IMFOA are weaker than covalent bonds, hence it is used as an lubricant
  • It is an electrical conductor
18
Q

Structure of macromolecules?

A

In a long chain, differs in hardness and flexibility

19
Q

MP/BP of macromolecules?

A
  • lesser than giant covalent structures, higher than simple molecular structures
  • not fixed
    [larger the macromolecule, higher the MP/BP]
20
Q

Electrical conductivity of macromolecules?

A

None as there are no charged/mobile ions

21
Q

Structure of metal compounds?

A

Giant metallic lattice structure

22
Q

Bonding between metal compounds?

A

electrostatic forces of attraction between positive metal ions and sea of delocalised electrons

23
Q

2 different types of metal compounds?

A

Metals & alloys

24
Q

MP/BP of metals?

A

High due to strong metallic bonds

25
Q

Solubility of metals?

A

insoluble in water and organic solvents

26
Q

Electrical conductivity of metals?

A

good electrical conductivity in all states due to mobile delocalised electrons

27
Q

Hardness of metals?

A

malleable and ductile
- shaped by applying pressure and stretching without breaking
- due to ions being able to slide past one another

28
Q

What are alloys?

A

micutre of metals with one or more other element (metal of non metal)

29
Q

MP/BP of alloys?

A

varies as it is a mixture

30
Q

solubility of alloys

A

insoluble in water and organic solvents

31
Q

electrical conductivity of alloys?

A

good in all states due to mobile delocalised electrons

32
Q

hardness of alloys?

A

hard due to its irregular structure, so ions cannot slide past one another (non-malleable)

33
Q

copper and tin form?

A

bronze

34
Q

iron and carbon form?

A

steel

Chemistry (9 decks)

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