Atomic Theory
by
Melvin1234
Last updated 7 years ago
Discipline:
Science Subject:
Chemistry
Grade:
10


1897
1803
Claimed that electrons were not inside the proton, but outside. He used the gold foil experiment to coclude is theory.
1913
John Dalton
Important Dates
370 B.C
1911
1910
Atomic Theory
1932
1936
He claimed that allmatter was made up of atoms. Atoms were invisible and indestructible. All atoms of a given element are identical in mass and properties. Dalton dedicated his life to experimenting with gases
Claimed atoms were small, hard particles that were made of the same material, but had different shapes and sizes.
Democritus
Ernest Rutherford
Claimed that atoms were made of electrons. He used the cathode ray experiment to form his model called plum pudding model.
JJ Thomson
He claimed that there was a charge in every particle in the atom. He used the oil drop experiment to find his theory.
Robert Millikman
Claimed that electrons could only occupy certain orbits or shells in an atom. Bohr studied with prisms and light his life to conclude his theory.
Neils Bohr
Claimed that electrons confined in their orbits would set up standing waves. Schrodinger did not do a experiment, but athought experiment about a cat in a bunker with radioactive material.
Erwin Schrodinger
He predicted that atoms had another particle, the neutron. Also he established that the atomic number is determined by the number of protons
James Chadwick
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