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Atoms
Parts of the Atom
Atoms are really small and make up everything around us:
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At the centre is a nucleus made up of protons (positive) and neutrons (neutral)
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This is surrounded by shells of electrons (negative)
Representing Atoms
This is how we can show the number of different types of particles in a particular atom.
Isotopes
You should remember that:
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Atoms have an equal number of protons and electrons
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Ions have a different number of protons and electrons, so are positive or negative
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Isotopes are atoms with the same number of protons but a different number of neutrons
The Alpha Scattering Experiment
An in-depth look at the experiment that led to the nuclear model of the atom.
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