Review Nuclear Chemistry

Why do we use fission instead of fusion in nuclear power plants?

• Fission produces more energy than fusion.

• Fission produces less pollution than fusion.

• Fusion requires a starting material that is too expensive to use.

• Fusion requires temperatures that are too high to maintain thus making energy production inefficient.

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Radioactive decay is:

• a spontaneous process.

• occurs when an unstable nucleus becomes stable.

• a process that produces a new element.

• all of the above.

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The most penetrating or most dangerous form of nuclear radiation is

• alpha

• beta

• gamma

• x-rays

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Which of the following is true about the concept of half-life?

• After one half-life, half of the original radioactive atoms have decayed into atoms of a new element.

• After a second half-life, all of the remaining atoms have decayed.

• All unstable nuclides have the same half-life.

• All of the above.

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Which type of nuclear reaction produces the most amount of energy?

• Chemical

• Fusion

• Fission

• They all produce the same amount.

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A piece of wood was found to have gone through 2 half-lives. If the half-life of carbon-14 is 5730 years, how old is the piece of wood?

• 1432.5 years

• 2865 years

• 22920 years

• 11460 years

Which of the following is not a reason an isotope is unstable?

• too many electrons

• too many protons

• too many neutrons

• an unstable neutron to proton ratio

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______ is the splitting of nuclei.

• Fission

• Decay

• Fusion

• Denaturation

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Which type of reaction changes the identity of the atom/element?

• chemical

• nuclear

• both

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What does an unstable (radioactive) isotope do to become stable?

• gain electrons

• form a bond with another element

• emit radiation

• become an ion

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