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460 BCE
Democritus
Know for formulating the atomic theory of the universe. -
427 BCE
Plato
Introduced the atomic theory! -
17 BCE
The Alchemist
Mixture of practical knowledge and speculation on the nature of matter. Later called Chemistry. -
Rober tBoyle
was an Irish natural philosopher, he made contributions to chemistry and physics. He played an important role in the scientific revolution. -
Antione Lavoisier
Knew that oxygen was a key substance in combustion, and he even named the element. -
Amadeo Avogadro
Discovered element could exist as molecules rather than individual atoms -
Dimitri Mendeleev
Created the first periodic table -
Pierre and Marie Culey
Discovered atoms themselves were radioactive -
Albert Einstein
He mathematically proved the existence of atoms. -
Ernest Rutherford
First to discover atoms have a Tony charged nucleus around an empty space -
Henry G. J Moslely
Discovered atomic number of all the elements using x-rays. -
Electron Cloud Model
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JJ Thompson
Invented the idea that all atoms have small negatively charged subatomic particles within the atom. -
John Dalton
Best known for introducing the atomic theory and his research into color blindness -
Robert Millikan
Discovered the charge of an electron. -
Niels Bohr
made fundamental contributions to understanding atomic structure and quantum theory -
James Chadwhich
Discovered the neutron