History of Atomic Theory

He proposed the particle theory of matter and called nature’s most basic particle the “atomos”

• Aristotle
• Democritus
• Chadwick
• Dalton

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He unknowingly discovered the electron as a result of cathode ray tube experiments.    

• Thomson
• Chadwick
• Democritus
• Rutherford

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The smallest particle of an element that still retains all the properties of that element. 

• atom
• cathode ray
• electron
• compound

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Rutherford’s experiment determined that the nucleus of an atom is tiny, dense and  ______ charged. 

• neutrally
• negatively
• positively

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The name of the scientist that came up with the plum pudding (or chocolate chip cookie) model is

• Thomson
• Rutherford
• Bhor
• Dalton

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Who is credited with developing the atomic theory?  (Sometimes called the father of atomic theory)

• John Dalton
• J. J. Thomson
• Earnest Rutherford
• Niels Bohr

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How did Rutherford discover the proton?

• Cathode tube ray experiment
• Gold Foil Experiment
• Planetary Model
• Plum Pudding Model

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What did James Chadwick discover?

• Neutron
• Proton
• Electron
• Electron Cloud

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Atoms of different elements are exactly alike

• Always true
• Always false
• Sometimes true

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The word "atom" comes from a Greek word that means

• Invisible
• Indivisible
• Undivided