Nuclear Fusion, Fission, and Electromagnetic Radiation

a nuclear reaction in which the nuclei of two atoms combine to form a larger nucleus

• fission

• fusion

• radioactivity

• half-life

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charged particles and electromagnetic waves that are emitted from the nuclei of radioisotopes

• nuclear radiation

• radioactivity

• radioisotope

• background radiation

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a nuclear reaction in which an atomic nucleus splits into two smaller parts

• radioactivity

• fission

• fusion

• half-life

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a penetrating form of nuclear radiation emitted by an unstable nucleus

• alpha particle

• beta particle

• gamma ray

• radioisotope

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What nuclear process occurs in the sun?

• fission

• fusion

• endothermic

• atomic bomb

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NGSS.HS-PS1-8

Why does nuclear fusion require high pressures and temperatures?

• To provide enough energy to split the nucleus.

• The two nuclei are both negatively charged and repel each other.

• To lower the cost.

• To overcome the electromagnetic repulsion of the nuclei.

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This is an example of ---

• Radioactive Decay

• Nuclear Fission

• Nuclear Fusion

• Fossil fuel reaction

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What happens in Nuclear Fusion?

• A large heavy nucleus splits apart.

• An unstable nucleus emits a helium nucleus.

• An unstable nucleus release in the form of gamma radiation.

• Two smaller nuclei combine to form a larger nucleus.

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NGSS.HS-ESS1-1

NGSS.HS-PS1-8

How do nuclear reactions (fusion & fission) compare to chemical reactions?

• They both release about the same amount of energy.

• Nuclear reactions release much more energy.

• Nuclear reactions release less energy.

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What is an alpha particle?

• An electron

• A Helium nucleus (2 protons & 2 neutrons)

• A high energy EM wave

• The largest subatomic particle

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