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442 BCE
Democritus
He told people that elements are made of something that can't to cut any farther. He called it an atom. -
Dalton
He said that Atoms are invisible and indestructible and he also said that all atoms are made for a different element. -
Maire Curie
She was the one that found out that some atoms and elements were radioactive. That was how she died. -
Ernest Rutherford
He shot high velocity alpha particles at the atoms and the atoms didn't deflect them very well. -
Niels Bohr
He thought that hydrogen atoms, went with the quantum theory. -
James Chadwick
He proved that a neutron was the mass as a proton.
