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Democritus came up with the idea of the 'atom', theorizing that the whole universe is made up of tiny particles, which are indestructible and indivisible.
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John Dalton discovered how to calculate atomic weight. Through this discovery, he learnt that all matter in the universe is indestructible and of constant mass. -
J.J. Thomson was the man who discovered electrons inside the atom. This finding lead to different views of the atomic structure. -
Albert Einstein demonstrated the existence of atoms and proved Democritus's theory to be correct - that the world was in fact made up of atoms, which were indestructible. -
Ernest Rutherford theorized and proved that the atom was mostly empty space, filled only by the nucleus, which contained most of the weight. -
Niels Bohr made the revolutionary discovery of electron orbits. This eventually lead to the configuration of shells and electrons. -
Werner Heisenberg came up with the theory that the exact point of matter cannot be pinpointed. This theory was called the 'uncertainty principal'. -
James Chadwick made the phenomenal discovery of neutrons, which, he proved made up the nucleus, and had no electrical charge.
