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Chemistry - Coggle Diagram
Chemistry
Ions
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Periods 1,2 and 3 lose electrons (positive charge)
Period 4 can either gain, lose or do neither
Periods 5, 6 and 7 gain electrons (negative charge)
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History of the atom
Bohr-Rutherford:
- Small nucleus has all mass
- Electrons orbit in concentric circles. 2, 8, 8.
Dalton's Atom:
- Indivisible spheres
False: bc subatomic particles
Thompson:
- Subatomic particles equally distributed
Rutherford:
- most atom is empty space
2.Uneven distribution
- Mass concentrated in small nucleus
Gold foil experiment:
- Neutron beam through gold foil
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Number of electrons per shell
Ex. 2,8,6