Atomic Structure

- Atoms contain protons, electrons and neutrons

- Protons and neutrons exist in the nucleus.

- Electrons exist in a series of energy shells around the outside of the nucleus.

Bonding

- There are three main types of bonding:

1. Ionic bonding

- between a metal and a non-metal, in which electrons are fully transferred.

2. Covalent bonding

- between non-metals and metals, in which electrons are shared.

3. Metallic bonding

- between metals, in which positive metal ions are held together by a negative electron cloud.