Scientists who discovered the atom

English chemist and physicist who formulated atomic theory and the law of partial pressures. He discovered that certain gases only could be combined in certain proportions even if two different compounds shared the same common element or group of elements.

• John Dalton

• J.J. Thompson

• Neils Bohr

• Ernest Rutherford

said that electrons are in energy levels, the further an electron was from the nucleus, the higher its energy -developed the planetary model. He discovered that the energy of an atom changes when it absorbs or emits light.

• John Dalton

• J.J. Thompson

• Neils Bohr

• Ernest Rutherford

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NGSS.HS-PS4-3

used the cathode ray tube to discover electrons, plum pudding model. The plums were the electrons, scattered throughout the atom.

• J.J. Thompson

• Democritus

• Erwin Schrodinger

• Neils Bohr

1909-solar system model of the atom, gold foil experiment- fired negative ions at thin sheet of gold foil, discovered the atomic nucleus and proposed a nuclear model of the atom.

• J.J. Thompson

• Ernest Rutherford

• Democritus

• Erwin Schrodinger

Greek philosopher that said all matter is made of tiny particles called "atomos" or atoms. Said that between atoms are empty spaces and they come in different shapes and sizes.

• Democritus

• J.J. Thompson

• Neils Bohr

• John Dalton

wave mechanical model of the atom and his work led to the electron cloud model. He said that the electron bound to the nucleus seemed like a standing wave.

• John Dalton

• Erwin Schrodinger

• Democritus

• Neils Bohr

Tags

NGSS.HS-PS4-3