Zusammenfassung der Ressource
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
- J.J Thomson
- 1987
- Electron
- Plum Pudding
- negative electrons in
a sphere of positive
- Atom is neutral
- 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
- James Chadwick
- 1932
- neutron