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Democritus
.Democritus was a greek philosopher. Who developed the concept of the 'atom', Greek for 'indivisible'. Democritus believed that everything in the universe was made up of atoms, which were were microscopic and indestructible -
John Dalton
John Dalton was an english chemist. His ideas form the atomic theory of matter. Here are his ideas. John Dalton discovered the nature of atoms. Not only that everything is made up of atoms, all atoms of same elements are identical. Also that compounds are made up of diffrent atoms -
J. J. Thompson
J. J. Thompson was an English scientist. He discover the electron when he was experimenting with gas discharging tubes. He noticed a movement in a tube. He called the movement cathode rays. The rays moved from the negative end of the tube to the positive end. He realized that the rays were made of negatively charged particles. -
Lord Ernest Rutherford
Ernest Rutherford conducted a famous experiment called the gold foil experiment. He used a thin sheet of gold foil. He also used special equipment to shoot alpha particles ( positivitely charged particles) at the gold foil. Most particles passed straight through the foil like the foil was not there. Some particles went straight back or were deflected ( went in another direction ) as if they had hit something. -
Niels Bohr
Niels Bohr was a Danish physicist. Niels Bohr created his atomic model in 1913 depicts the atom as a small positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus.
