1(g) Covalent Bonding

Question 1

Covalent Bonding

Answer 1

Strong electrostatic attraction between a shared pair of electrons and the nuclei of the atoms

Question 2

When does covalent bonding occur?

Answer 2

Between non - metals

Question 3

Why do simple-covalent molecular structures have low melting and boiling points?

Answer 3

Have intermolecular forces of attraction between molecules which require little energy to overcome

Question 4

What do intermolecular forces increase with?

Answer 4

Mass

Question 5

Properties of simple covalent molecules

Answer 5

Insoluble in water
Soluble in other simple covalent liquids

Question 6

Giant Covalent Structures: Diamond

Answer 6

Tetrahedral Structure

Uses:
Jewellery

Question 7

Giant Covalent Structures: Graphite

Answer 7

Conducts electricity

Uses:
Lubricant
Pencils

Question 8

Fullerene

Answer 8

Simple Covalent molecule

Uses:
Lubricant

Question 9

Why don’t covalent compounds conduct electricity?

Answer 9

No delocalised electrons
So charge cannot flow