Atom Timeline

Events

Democritus

400 B.C

He was the "creator" of the idea for the atom, He thought that atoms were little tiny quantities of mass and that everything in the world was made up of atoms.

Dalton

1810

Proposed that all atoms were indestructible and couldn't be broken. Only rearranged.

Thomson

1897

Created a plum pudding model of what he thought an atom was like. He later discovered the atomic nucleus which changed his perception of the atom entirely.

Rutherford

1911

Created the well known "gold foil experiment" which was when he shot an atom gun at a sheet of gold foil and the atom bounced off instead of passing through. This changed the way we thought about atoms forever.

De brogile

1924

He discovered the wave nature of electrons and suggested that all matter have a certain wave property.

Schrodinger

1926

He used mathematical equations to find the exact position of the nucleus in an atom. This model is known as "The quantum mechanical model" of an atom.

Heisenberg

1927

Contributed to the atomic theory by including quantum mechanics, the branch of mechanics, based on quantum theory. This was important because he was able to reinvent the way we see the atom

Bohr

1939

Depicted the atom as a small, positively charged nucleus surrounded by electrons that that move circularly around the nucleus.