Chemoooo
- Created by: Zara Adams
- Created on: 12-12-12 18:45
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- Atoms
- Electrons are tiny and negatively charged
- Electrons are arranged in shells around the nucleus.
- Neutrons are heavy and neautral
- Electrons move around the nucleus and are negatively charged.
- Nucleus is in the middle of the atom and contains protons and neutrons.
- The charge on the electrons is the same as the charge on the protons - but opposite.
- Protons are heavy and positively charged.
- Almost the whole mass of an atom is concentrated in the nucleus.
- Atoms of the same element all have the same number of protons - and atoms of different elements will have different numbers of protons.
- If some electrons are added or removed, the atom becomes charged and is then an ion.
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