95567
Description
Mind Map by hannah-lewis, updated more than 1 year ago
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Created by hannah-lewis
about 11 years ago
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Atomic
Theory
- John Dalton
- 1808
- "All atoms are made up of
small individual particles"
- Atoms of the same element
are identical
- atoms rearranged in
a chemical reaction
- Compounds are 2 or
more atoms together
- 1808
- J.J Thomson
- 1987
- Electron
- Plum Pudding
- negative electrons in
a sphere of positive
- negative electrons in
a sphere of positive
- Atom is neutral
- 1987
- Ernest Rutherford
- 1913
- discovery of
nucleus
- Protons = Electrons
- electrons are around a positive nucleus
- protons are 2000
times heavier
than electrons
- most mass
is in the
nucleus
- 1913
- James Chadwick
- 1932
- neutron
- 1932
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