Unit 3: Atoms, Isotopes, Nuclear, & P.T.

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

• Aristotle
• Democritus
• Chadwick
• Dalton

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

• Thomson
• Chadwick
• Democritus
• Rutherford

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NGSS.MS-PS1-1

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

• atom
• cathode ray
• electron
• compound

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NGSS.MS-PS1-1

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

• neutrally
• negatively
• positively

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NGSS.HS-PS1-8

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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NGSS.MS-PS1-1

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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NGSS.MS-PS1-1

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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NGSS.MS-PS1-1

Electrons can be found in

• The protons
• The nucleus
• Electron Clouds
• exact locations

This contains most of the mass of an atom

• Electron Cloud
• Nucleus
• Electron

Tags

NGSS.MS-PS1-1