Science revision
- Created by: rossbrooks123
- Created on: 01-05-16 19:49
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Atoms
Chemistry revision
- What is an atom made up of?
Nucleus:
- The nucleus is in the middle of the atom.
- Necleus' contain both protons and neutrons.
- The protons in the nucleus give it a positive charge.
- The vast majority of the mass in an atom is concentrated in the nucleus.
Electrons:
- Electrons move around the nucleus in electron shells.
- Electrons are negatively charged.
- They cover a lot of space however they are very very small.
- The volume of their orbits determines the size of the atom.
- Atoms have a radius of around 10(-10) m.
- Electrons have very little mass.
Protons, neutrons and electrons:
- Protons are heavy and positively charged.
- Neutrons are heavy and neutral.
- Electrons are tiny…
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