HS-PS1-8 Nuclear Chemistry

Which process occurs when a nucleus splits into two smaller nuclei, releasing a large amount of energy?

• Fusion

• Fission

• Radioactive decay

• Ionization

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Which of the following best describes nuclear fusion?

• A nucleus splits into two smaller nuclei

• An atom loses electrons

• Two smaller nuclei combine to form a larger nucleus

• A neutron is ejected from an atom

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NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Which nuclear process powers the Sun?

• Fission

• Fusion

• Radioactive decay

• Alpha decay

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NGSS.HS-ESS1-1

In nuclear fission, what particle is often used to initiate the reaction?

• Proton

• Electron

• Neutron

• Alpha particle

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Which type of radiation consists of two protons and two neutrons?

• Alpha radiation

• Beta radiation

• Gamma radiation

• Neutron emission

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What happens to the atomic number of an element when it undergoes beta decay?

• It decreases by 2

• It increases by 1

• It stays the same

• It decreases by 1

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Which of the following statements about gamma radiation is true?

• It has mass and charge

• It consists of high-energy electromagnetic waves

• It consists of helium nuclei

• It is stopped easily by paper

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NGSS.HS-PS4-3

Which of the following nuclear processes produces the most energy per reaction?

• Nuclear fission

• Nuclear fusion

• Chemical combustion

• Beta decay

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Which of the following equations represents a nuclear fission reaction?

• U-235 + n --> Ba-144 + Kr-89 + 3n

• H-2 + H-3 --> He-4 + n

• C-14 --> N-14 + e-

• Ra-226 --> Rn-222 + He-4

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NGSS.HS-PS1-8

What force is responsible for holding the nucleus together despite repulsive forces between protons?

• Gravitational force

• Weak nuclear force

• Strong nuclear force

• Electromagnetic force