Atomic Theory and Atoms

The scientist responsible for "discovering" the nucleus is:

• Bohr
• Rutherford
• Schroedinger
• Einstein

The nucleus of an atom can be described as:

• spacious and negatively charged
• dense and positively charged
• spacious and positively charged
• dense and negatively charged

Tags

NGSS.MS-PS1-1

Electrons are not factored into atomic mass because:

• They are so small their mass can be ignored

• They're not in the nucleus

• They're too big

• They move so quickly their mass is zero

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 nucleus of an atom contains?

• Electrons and neutrons

• Protons and neutrons

• Protons, Neutrons and Electrons

• DNA and RNA

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NGSS.MS-PS1-1

In an atom, electrons move in definite orbits around the nucleus.

• Thomson
• Rutherford
• Bohr
• Democritus

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Thomson
• Ernest Rutherford
• John Dalton
• Democritus

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NGSS.MS-PS1-1

The first person to propose a theory about an atom called the Atomos Theory was

• Democritus
• Rutherford
• Dalton
• Aristotle

An atom with atomic number 6, atomic mass of 12, and charge of 0, would have how many protons?

• 3

• 12

• 6

• cannot be determined

Tags

NGSS.MS-PS1-1

If the mass number of this chlorine atom is 36, how many neutrons does it have?

• 17

• 18

• 19

• can't be determined

Tags

NGSS.MS-PS1-1