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400 BCE
Democritus
The person who coined the term "atom". He came up with many true theory's that turned out to be right but he wasnt credited with his theory's until much later. -
John Dalton
Experimented with gases to make modern theories of atoms. "Matter is made up of atoms that are indivisible and indestructible" -
J.J. Thomson
He made a model that suggested that the atom was a sphere of positive matter and the electrons were postponed by electrostatic forces. He also discovered the electrons with his experiments. -
Rutherford
He did experiments that suggested that J.J. Thomsons theories were incorrect. -
Niels Bohr
He depicted that the nucleus was small and positively charged, and that the electrons orbited the nucleus. He thought that the electrons only had a certain range of motion they could follow.
