Paper 1 - Simple covalent molecules and Giant covalent structures

Question 1

What is a simple covalent molecule?

Answer 1

A simple covalent molecule is a few atoms that are held together by strong covalent bonds

Question 2

Three properties of simple covalent molecules -

Answer 2

The three properties of simple covalent molecules include low melting and boiling points, they don’t conduct electricity, they have weak intermolecular forces

Question 3

Two examples of simple covalent molecules -

Answer 3

Two examples of simple covalent molecules are hydrogen and pure water

Question 4

What is a giant covalent structure?

Answer 4

A large group of atoms that are arranged in lattices with covalent bonds

Question 5

Two properties of giant covalent structures -

Answer 5

Giant covalent structures have high melting points and have variable electrical conductivity

Question 6

Why do giant covalent structures have high melting points?

Answer 6

Giant covalent structures have high melting points but they are held together by many bonds

Question 7

What makes an atom have electrical conductivity?

Answer 7

An atom will have electrical conductivity if there are delocalised electrons that carry a charge

Question 8

Describe the conductivity of graphene

Answer 8

Graphene is a good electrical conductor because they have lots of delocalised electrons which carry a charge

Question 9

Name two examples of giant covalent structures

Answer 9

Two examples of giant covalent structures include diamond and graphite/graphene