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8 Cards in this Set

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Father of nuclear physics, developed theory of structure of atom. used gold foil experiment, discovered nucleus

Rutherford

Concluded electrons orbit around nucleus, 1913. 5th

Bohr

Negatively charged electrons revolved around a dense, positive nucleus

Rutherford, 1911. 4th

An atom is small, hard and indestructible sphere that can’t be subdivided

Dalton, 1803

Plum pudding, raisin bun model whereby electrons and protons are evenly spaced throughout atom

Thomson, 1898. 3rd

British discovered theory of matter is composed of Adams of different weights and is combined and ratios by

Chadwick, 1930’s. 6th

Greek philosopher co-originated thought that all matter is composed of individual elements

Democritus, 1st

British discovered theory of matter and is composed of atoms of different weights and is combined and ratios by weight. Proposed atoms: spherical

Dalton, 1803. 2nd