Forming ions

How are ions made?

When electrons are transferred, atoms gain or lose electrons

What are ions?

Charged particles - they can be single atoms or groups of atoms

What are atoms trying to do when they form ions?

They're trying to get a full outer shell to be stable

What happens when metals form ions?

They lose electrons from their outer shell to form positive ions

What happens when non metals form ions?

They gain electrons into their outer shell to form negative ions

What groups are most likely to form ions?

Groups 1 & 2 and 6 & 7

What are Groups 1 & 2?

Metals and they lose electrons to form positive ions (cations)

What are Groups 6 & 7?

Non - metals and they gain electrons to form negative ions (anions)