Covalent compounds

Question 1

What is covalent bonding

Answer 1

Shared pair of electrons between atoms

Question 2

What elements is it

Answer 2

2 non-metals

Question 3

Properties of covalent bonds

Answer 3

Very strong
Simple and giant structures

Question 4

Simple molecules

Answer 4

Relatively small atoms joined by covalent bonds
No electrical charge
Low melting and boiling point
Weak intermolecular forces
Larger molecules=stronger forces

Question 5

Giant covalent structures properties

Answer 5

Strong intermolecular forces
Very high melting and boiling points
Solids

Question 6

Diamond

Answer 6

Carbon
Giant covalent structure(lattice)
4 bonds
High melting point due to strong forces

Question 7

Graphite

Answer 7

Carbon
High melting point
3 bonds
Layered hexagonal structure
Weak intermolecular forces between layers so are slippery and soft
Delocalised electron=conduct of electricity

Question 8

Silicon dioxide

Answer 8

Similar structure to diamond
Each oxygen atom is joined to 2 silicon atoms
Each silicon atom is attached to four oxygen atoms