C1

Atoms have a small nucleus surrounded by electrons, in the middle of the atom

This contains protons and neutrons

Protons- pos. charge

Neutrons- no charge

Nucleus has an overall pos. charge

Electrons are negatively charged and move around the nucleus

They are tiny, but cover a lot of space and occupy shells around the nucleus

Atoms are neutral (no overall charge)

Charge on the electrons = charge on protons, but opposite

Number of protons = number of electrons in an atom

If electrons are added/removed, the atom becomes charged and is an ion