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Democritis
He first proposed the existence of an indivisible particle. -
John Dalton
He was the first to introduce the atomic theory saying that atoms were solid spheres, and that different spheres made up elements. -
J.J. Thompson
Thompson was the discoverer of the Electrons. After discover this, at 1897 he concluded that the atom was a positive charge sphere with some Electrons (negative charges) that were stuck in it. -
Ernest Rutherford
Rutherford and his student, Marsden, published his atomic theory describing the atom as having a central positive nucleus surrounded by negative orbiting electrons -
Neil Bohr
He Explained how the Electrons are moving constantly around the atom's nucleus where there are Protons. -
Erwin Schrödinger
Edwin Schrodinger stated that rather than electrons being distributed within an electron configuration of shells and energy levels, they were arranged in orbitals which were systematically distributed within Electron Clouds.
