Topic 1: Atoms
- Created by: plap101
- Created on: 15-03-18 19:19
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- Atoms
- Contains protons, neutrons and electrons
- Have no charge (neutral)
- Protons are positive, neutrons are neutral, electrons are negative
- Mass number = total number of protons and neutrons
- Atomic number = number of protons
- Nucleus
- Contains protons and neutrons
- Has a positive charge
- Located in the middle of an atom
- Has a radius of 0.1nm
- Electrons
- Negatively charged
- Have no mass
- Move around the nucleus in shells
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