History of the Atom and Basic Atomic Structure

Who was the first contributor to the atomic theory?

• John Dalton

• Ernest Rutherford

• JJ Thompson

• Democritus

• Neils Bohr

All matter is made of atoms. Which of the following statements best describes the basic structure of an atom?

• Electrons and protons are in motion around a nucleus that contains neutrons

• Neutrons are in motion around a nucleus that contains protons and electrons

• Protons are in motion around a nucleus that contains electrons and neutrons

• Electrons are in motion around a nucleus that contains protons and neutrons

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NGSS.MS-PS1-1

In early versions of the periodic table, elements were arranged based upon atomic mass. The elements on the periodic table are now arranged in order of which of the following?

• atomic number

• date of discovery

• number of neutrons

• reactivity with hydrogen

Which Scientist performed the Gold foil experiment. Determined that Atoms are mostly empty space with a nucleus.

• Ernest Rutherford

• Niels Bohr

• John Dalton

• JJ. Thompson

Rutherford's gold foil experiment provided evidence that...

• Negative and positive charges are spread evenly throughout the atom.

• Alpha particles have a positive charge.

• Gold is not a dense as previously thought.

• There is a dense positively charged nucleus at the center of an atom.

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What contribution did John Dalton make to atomic theory? 

• He discovered that every atom was positively charged. 

• He discovered that every element consisted of one type of atom.  

• He discovered that atoms had nuclei. 

• He discovered that atoms could be divided into smaller parts. 

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NGSS.HS-PS1-7

Which is the correct sequence of the scientists who made major changes in the model of the atom?

• 2, 1, 4, 3, 5

• 3, 1, 5, 4, 2

• 5, 3, 2, 1, 4

• 4, 3, 2, 1, 5

Which Scientist said, Everything is made of tiny particles surrounded by empty space

• Democritus

• Aristotle

• John Dalton

• JJ. Thompson

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NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which Scientist said, matter made of atoms that can not be created or destroyed

• Democritus

• Aristotle

• John Dalton

• JJ. Thompson

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NGSS.HS-PS1-7

Which Scientist said, Uniform spheres of positive charges surrounded by electrons.

• Democritus

• Aristotle

• John Dalton

• JJ. Thompson