History of atom

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

• Aristotle
• Democritus
• Chadwick
• Dalton

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NGSS.MS-PS1-1

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

• Thomson
• Chadwick
• Democritus
• Rutherford

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

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

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

How did Rutherford discover the proton?

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

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NGSS.HS-PS1-8

What does the Bohr model suggest?

• Atoms are small, hard, indivisible objects. 
• That protons in the nucleus are attracted to electrons in the electron clouds. 
• That electrons travel around the nucleus of an atom in orbits or definite paths.

Atoms of different elements are exactly alike

• Always true
• Always false
• Sometimes true

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NGSS.MS-PS1-1

Discovered the neutron

• Ernest Rutherford

• James Chadwick

• J.J. Thomson

• John Dalton

Neutrons are in the nucleus of the atom. A neutron has

• A positive charge

• No charge

• A negative charge

• Twice as much positive charge as a proton