Most Alpha Particles Pass Through a Thin Layer of Gold Without Deflection

Most alpha particles pass through a thin layer of gold without deflection because gold atoms

• are filled with positively charged matter.

• have no overall charge.

• have a negatively charged nucleus.

• do not have a nucleus.

• have a dense nucleus surrounded by space.

Most alpha particles pass through a thin layer of gold without deflection because gold atoms

• are filled with positively charged matter.

• have no overall charge.

• have a negatively charged nucleus.

• do not have a nucleus.

• have a dense nucleus surrounded by space.

What experiment led to the discovery that most of an atom's mass is concentrated in a small, dense nucleus?

• Thomson's Cathode Ray Experiment

• Rutherford's Gold Foil Experiment

• Millikan's Oil Drop Experiment

• Bohr's Hydrogen Spectrum Experiment

Which scientist is credited with the discovery of the atomic nucleus?

• Niels Bohr

• J.J. Thomson

• Ernest Rutherford

• Albert Einstein

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NGSS.HS-PS1-8

In Rutherford's gold foil experiment, what was the main observation that led to the nuclear model of the atom?

• All alpha particles were deflected.

• Most alpha particles passed through with little or no deflection.

• Alpha particles were absorbed by the foil.

• Alpha particles were converted into beta particles.

What is the charge of an alpha particle?

• Neutral

• Positive

• Negative

• Variable

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NGSS.HS-PS1-8

Why do some alpha particles deflect at large angles in the gold foil experiment?

• They collide with electrons.

• They are repelled by the dense nucleus.

• They are absorbed by the gold atoms.

• They pass through empty space.

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NGSS.HS-PS2-4

What is the composition of an alpha particle?

• Two protons and two neutrons

• Two electrons and two protons

• Two neutrons and two electrons

• One proton and one neutron

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NGSS.MS-PS1-1

Which of the following best describes the structure of an atom according to Rutherford's model?

• Electrons are embedded in a sphere of positive charge.

• Electrons orbit a dense nucleus.

• Electrons are scattered throughout a positive cloud.

• Electrons are stationary around the nucleus.

What was the main conclusion of Rutherford's gold foil experiment?

• Atoms are indivisible.

• Atoms have a dense central nucleus.

• Atoms are mostly empty space.

• Atoms have a uniform distribution of charge.

Tags

NGSS.HS-PS1-8