Bonding (Kelvin,HongHwee,Shaun)

3 steps to form an ionic compund

1st step : Formation of positive ions

2nd step:formation of negative ions

3rd step : formation of ionic bond

When metals react with non metals , an ionic compund is formed.

We show ionic bonding by using the dot and cross diagram

Chemical formula

All the positive charges must euqal all the negative charges in an ionic compunds.

THe bond formed between atoms that share electrons is called a covalent bond.

A molecule is a group of two or more atoms held together by covalent bonds