Chapter Six

Question 1

Properties of non- metal compounds

Answer 1

• Don’t conduct electricity
• Soft in solid state

Question 2

Molecule

Answer 2

A discrete group of atoms bonded together with a known formula

Question 3

Intermolecular bonds

Answer 3

The forces of attraction between atoms within molecules

Question 4

Intermolecular forces

Answer 4

The forces of attraction between neighbouring molecules

Question 5

Covalent bonding

Answer 5

When non-metal atoms share electrons

Question 6

Covalent bonding is…

Answer 6

• More stable than the separate atoms
• Relatively high in number of electrons in valence

Question 7

How are atoms kept together in covalent bonding

Answer 7

The charged nuclei of neighbouring atoms each have an attraction for the shared electrons so this keeps the atoms held together in a molecule

Question 8

Single covalent bonds

Answer 8

• When atoms share 2 electrons, 1 from each atom
• 2 electrons = electron pair

Question 9

Double covalent bonds

Answer 9

• 2 pairs of electrons are shared between the atoms
• 4 in total

Question 10

What are molecules that contain 2 atoms called

Answer 10

Diatomic molecules

Question 11

What are non-bonding electrons

Answer 11

Valence shell electrons not involved in the bonding

Question 12

What are non-bonding electron pairs called

Answer 12

Lone electron pairs/lone pairs

Question 13

Triple covalent bonds

Answer 13

• 3 pairs of electrons are shared between 2 atoms
• 6 in total

Question 14

Polyatomic molecules

Answer 14

Molecules made up of more than 2 types of atoms

Question 15

How do the molecules of polyatomic ions bond

Answer 15

Covalently

Question 16

Different ways of representing molecules

Answer 16

• Ball and stick
• Space-filling
• Lewis dot diagram
• Lewis dot diagram with lines for bonds

Question 17

Shapes of molecules

Answer 17

A diatomic molecule is linear

Question 18

How do electron pairs arrange themselves

Answer 18

As far away as possible