Covalent Structure

Question 1

What are the two types of covalent structure

Answer 1

Simple

Giant (macromolecules)

Question 2

Give two types of macromolecules

Answer 2

Diamond and graphite (forms of carbon)

Silicon dioxide (silicon)

Question 3

How are the atoms in the lattices linked

Answer 3

Strong covalent bonds cause high melting points

Question 4

What does diamond contain in terms of carbon bonds

What does this cause the diamond to be

Answer 4

Each carbon atom forms four covalent. Ones with other carbon atoms

Makes it hard

Question 5

What does graphite contain in terms of carbon and layers

What does this cause graphite to be

Answer 5

Each carbon atom bonds to three others forming layers

Layer slide over each other- as no covalent bonds- between layers making soft and slippery

Question 6

What are the properties of graphite electrons from carbon

Answer 6

One electron from each carbon is delocalised so conducts heat and electricity

Question 7

What can carbon also form

Answer 7

Fullerenes with different carbon atoms N.O

Question 8

What are fullerenes used for

Answer 8

Drug delivery in body
Lubricants
Catalysts
Nanotubes for reinforcing materials