Atomic History CFA - Quizizz

True or False? John Dalton believed that moving electrons exist in electron clouds around the nucleus. 

• False
• True 

What was the name of J.J Thomsons' model of atomic structure. 

• Electron Cloud Model 
• Electron Sea Model
• Plum Pudding Model 
• Bohr Model

What was James Chadwicks most notable discovery?

• The nucleus contains protons. 
• The nucleus contains neutrons.
• Electron are not fixed.
• Protons are positive.

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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.

Who proposed that the atom consists mostly of empty space?

• Bohr
• Dalton
• Rutherford
• Chadwick

Which model suggested that: Atoms mostly consist of positively charged material with negatively charged particles (electrons) located throughout the positive material.

• Bohrs Model
• Plum Pudding Model 
• Democritus Model
• Our current model 

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NGSS.MS-PS1-1

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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NGSS.HS-PS1-8