Atomic models started with a Greek philosopher named Democritus He bei
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Atomic models started with a Greek philosopher named Democritus. He, being a philosopher, conducted NO experiments, but concluded that all matter was made from an atom. He is the first person to use the word "atom" which means "indivisible", because he thought that it couldn't be taken apart. His model was a small ball with hooks sticking out to hold together the matter.
Next came John Dalton's model. Dalton concluded that matter was indivisible, but different sizes because of heat envelopes surrounding the atom. Dalton's model is a bunch of hard spheres.
Then came J.J. Thomson's model, also known as the "plum pudding model". His model had negatively charged particles (electrons) surrounded by a positive "pudding". He discovered the electron.
Then came the Rutherford model. Rutherford concluded that the atom was mostly empty space, it was divisible, and that electrons surrounded the nucleus of an atom in no given order. Rutherford's model had a nucleus with protons and neutrons,
with electrons orbiting it.
Next is the popular Bohr Planetary Model. Neils Bohr said that the electrons of an atoms orbited the nucleus in an order and stayed withing energy levels, or shells.
The now-accepted atomic model is the Quantum model made by Heisenburg. He created the laws of indefinite proportion. In his model, the nucleus is surrounded by a haze. The haze is the electrons, and the darkest part is where most of the electrons are orbiting.
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Physics, Chemistry, Nature, Nuclear physics, Atoms, Ernest Rutherford, Amount of substance, Atomic theory, Rutherford model, Plum pudding model, Niels Bohr, Atomic nucleus
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