Who discovered the atom and when?

J.J Thomson

Considering this, who came up with the theory of atoms?

Democritus

Who is the inventor of atoms?

The Bohr model completely opened the door to the theory of quantum mechanics, which is still used today to describe the behavior of atomic and subatomic particles. In this standard telling of the story, Ernest Rutherford is given credit as the scientist who “invented” the planetary model of the atom.

Who came up with the term atom?

Democritus

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