3.02.23 | Physics Review

____________________ is when small nuclei become more stable by joining together to form larger nuclei

• Fusion
• Fission
• Half Life
• Decay

In all nuclear reactions, the total of the atomic numbers on the left side of the equation must equal the total of the atomic numbers on the right side of the equation.

• True
• False

Each particular ____________________ has its own half-life.

• Isotope
• Proton
• Neutron
• Nucleon

The disintegration of unstable nuclei occurs all at once.

• True
• False

The breakup of a larger nucleus into two or more smaller nuclei is ____________________.

• Fission
• Fusion
• Half Life
• Conservation

Nuclear power plants produce electricity through _____.

• induced fission
• beta decay
• Alpha decay
• induced fusion

Which one of these statements is true about the moderator and the control rods in a nuclear power station?

• The control rods slow the neutrons down, while the moderator absorbs the neutrons
• The moderator slows the neutrons down, while the control rods absorb the neutrons
• The moderator and control rods absorb the neutrons
• None of the above

A moderator in a nuclear reactor decelerates the neutrons.

• True
• False

U-235 nuclei split when struck by _______.

• a neutron
• an electron
• a proton

Why are alpha particles easier to stop by materials than beta particles?

• They are larger
• They are weaker
• They are negatively charged
• They are slower