The History of The Atomic Theory

JOHN DALTON

• 1766-1844
• English Meteorologist, Chemist and physicist
• Found out in 1803 that matter was made up of atoms.
• founded that atoms created the pressure in gas.
• John dalton is important to the world because he is the reason we are able to pressurize gas.

J.J. THOMSON

• 1856-1940
• Professor / Physicist
• determined that the atom was sphere and electrons orbited around it. in 1904
• Played a key role in unlocking the atom
• without this man we might not have be as far in unlocking the atom as we are today.

EARL RUTHERFORD

• 1871- 1937
• Held Experiments 1909-1911
• These expirement led to the planetary model
• played a key role in understanding how the atom looks
• Without this man we might not have had as much of an accurate depiction of the atom.

NEILS BOHR

• 1885-1962
• Made rutherfords atomic structure
• determined electrons stationary orbit
• played a key part in unlocking electrons
• without this man we might think electrons were in the nucleus.

IRENE CURIE

• 1897-1957
• Contributed to the synthesis of elements
• Was partnered with her husband.
• French physicist
• Without this woman we wouldn't have the knowledge to make compounds.

ROBERT MILLIKMAN

• 1868-1953
• Determined the charge of an electron in 1909
• Was able to do this through expirement a in Chicago
• this experiment has given us the knowledge to calculate mass of an atom

THE SIGNIFICANCE