Covalent Bonding

Question 1

What does single covalent bond contain?

Answer 1

Shared pair of electrons

Question 2

Macromolecular structures

Answer 2

Giant covalent structure with huge network of covalently bonded atoms

Question 3

Structure of graphite

Answer 3

Carbon atoms in sheets of flat hexagons covalently bonded with 3 bonds each
Delocalised 4th electron

Question 4

3 uses of graphite

Answer 4

1) Dry lubricant
2) Pencils
3) Strong lightweight sports equipment

Question 5

5 properties of graphite

Answer 5

1) Slippery
2) Electrical conductor
3) Low density
4) Very high melting point
5) Insoluble

Question 6

Why is graphite slippery?

Answer 6

Weak bonds between layers are easily broken so sheets slide over each other

Question 7

What shape is diamond?

Answer 7

Tetrahedral

Question 8

5 properties of diamond

Answer 8

1) Very high melting point
2) Extremely hard
3) Good thermal conductor
4) Can’t conduct electricity
5) Insoluble

Question 9

Why is diamond a good thermal conductor?

Answer 9

Vibrations travel easily through stiff lattice

Question 10

2 uses of diamond

Answer 10

Diamond-tipped drills & saws

Question 11

What are the 2 types of covalent structures?

Answer 11

Simple molecular and giant covalent molecular

Question 12

Bonds in simple molecular

Answer 12

Strong covalent bonds within molecule that are not broken when melted/boiled
Weak intermolecular forces between molecules

Question 13

Bonds in giant covalent molecular

Answer 13

Strong covalent bonds within molecule that are broken when boiled/melted

Question 14

What is another name for giant covalent molecular?

Answer 14

Macromolecular