Atomic Theory

Who is known as the father of modern atomic theory?

• Niels Bohr

• John Dalton

• Ernest Rutherford

• J.J. Thomson

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DOK Level 1: Recall

Which subatomic particle has a positive charge?

• Electron

• Neutron

• Proton

• Positron

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DOK Level 1: Recall

What is the main idea of Dalton's atomic theory?

• Atoms are indivisible and indestructible particles.

• Atoms are made up of electrons, protons, and neutrons.

• Atoms can change from one element to another.

• Atoms are mostly empty space.

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DOK Level 1: Recall

Calculate the number of neutrons in an atom of Carbon-14.

• 6

• 8

• 14

• 12

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DOK Level 2: Skill/Concept

Which experiment led to the discovery of the nucleus?

• Cathode Ray Tube Experiment

• Gold Foil Experiment

• Oil Drop Experiment

• Double-Slit Experiment

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DOK Level 1: Recall

Which subatomic particle was discovered first?

• Proton

• Neutron

• Electron

• Quark

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DOK Level 1: Recall

Explain why isotopes of the same element have different mass numbers.

• They have different numbers of protons.

• They have different numbers of electrons.

• They have different numbers of neutrons.

• They have different numbers of positrons.

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DOK Level 2: Skill/Concept

Which scientist proposed the plum pudding model of the atom?

• Niels Bohr

• John Dalton

• Ernest Rutherford

• J.J. Thomson

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DOK Level 1: Recall

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

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DOK Level 1: Recall

Using the periodic table, determine the number of protons in an atom of oxygen.

• 6

• 8

• 16

• 18

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DOK Level 1: Recall