History of the Atom

proposed the solid sphere model for the atom

• J.J Thompson
• Rutherford
• John Dalton
• Bohr

first person to theorize that atoms are made of tiny particles

• Democritus

• Aristotle

• J.J Thompson

• Dalton

Who came up with this model of an atom?

• J.J. Thompson
• Ernest Rutherford
• Neils Bohr
• James Chadwick

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particle has a mass of 1 amu and has no charge

• Neutron
• Proton
• Electron

He proposed the  "plum pudding model of the atom.

• John Dalton
• Niels Bohr
• Ernest Rutherford
• JJ Thomson

performed the Gold Foil Experiment

• J. J. Thomson
• Ernest Rutherford
• Neils Bohr
• John Dalton

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particle has a mass of 0 amu and a negative charge

• Electron
• Proton
• Neutron

discovered the charge of the electron

• Dalton
• Thomson
• Rutherford
• Millikan

performed the Cathode Ray Tube experiment

• Niels Bohr
• Robert Millikan
• J. J. Thomson
• Ernest Rutherford

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NGSS.HS-PS3-5

said that "All atoms of an element are identical" in his Atomic Theory

• Democritus
• John Dalton
• J. J. Thomson
• Niels Bohr