T2

Question 1

What are the main properties of ionic compounds?

Answer 1

• hard
• brittle
• conduct electricity but only when dissolved
• Hight b.p and mp

Question 2

What is a covalent bond?

Answer 2

electrostatic attraction between between two nuclei and the shared pair of electrons between them.

Question 3

What is a dative covalent bond?

Answer 3

When the pair of electrons forming a covalent bond are donated by one atom only.

Question 4

4 bond pairs 0 lone

Answer 4

tetrahedral 109.5

Question 5

3 bonds 1 lone

Answer 5

trigonal pyramidal 107.5

Question 6

2 bonds 2 lone

Answer 6

Bent 104.5

Question 7

5 bonds 0 lone

Answer 7

Trigonal bipyramidal
120 and 90

Question 8

Define electronegativity

Answer 8

The ability of an atom to attract the bonding pair of elctrons towards itself.

Question 9

What is metallic bonding?

Answer 9

the strong eletcrostatic attraction between metal ions and delocalised electrons

Question 10

What is the stucture and property of diamond?

Answer 10

Each carbon has 4 strong covalent bonds in a very rigid giant covalent structure.

• hard
• does not conduct electricity

Question 11

Describe the structure of graphite

Answer 11

Each carbon has 3 covalent bonds to create layers of hexagons. Each carbon atoms also has 1 delocalised electron.