Atomic history

Who was the first contributor to the atomic theory?

• John Dalton

• Ernest Rutherford

• JJ Thompson

• Democritus

• Neils Bohr

What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?

• Neils Bohr, Ernest Rutherford, JJ Thomson, John Dalton, & Democritus

• JJ Thomson, John Dalton, Neils Bohr, Ernest Rutherford, & Democritus

• Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Neils Bohr

• John Dalton, Neils Bohr, JJ Thomson, Democritus, & Ernest Rutherford

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What were J. J. Thomson's three contributions to the atomic theory?

• Discovered the electron

• Discovered the nucleus -did the gold foil experiment

• Used the cathode ray tube in his discovery

• Created a model of the atom with electrons moving around the nucleus in fixed orbits

• Created the "plum pudding" model of the atom

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What is Neils Bohr's contribution to the atomic theory?

• Created the atomic theory

• Created a model of the atom with electrons moving around the nucleus in a fixed orbits

• Discovered that the proton had a positive charge

• Believed that atoms of a given element are identical

• Discovered the electron

What were Ernest Rutherford's three contributions to atomic theory?

• Discovered that the atom is mostly empty space

• Discovered the nucleus- did the gold foil experiment

• Used the cathode ray tube in his discovery

• Discovered the electron

• Discovered that the proton had a positive charge

Which scientist saw the atom as a solid sphere?

• Dalton
• Thomson
• Rutherford
• Bohr

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Who came up with this model of an atom?

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

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Who's model is this?

• Thomson
• Rutherford
• Democritus
• Bohr

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Who came up with this model?

• Dalton
• Thomson
• Rutherford
• Bohr

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Discovered particles in the nucleus of atoms, neutrons

• Niels Bohr
• Ernest Rutherford
• J.J. Thomson
• James Chadwick

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