Radioactivity and Half Life - Physical Science

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What does X represent?

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Element Symbol

Front

Energy in the sun is produced as a result of nuclear ____ reactions.

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fusion

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What is the Half life of this isotope?

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10 seconds

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What makes something radioactive?

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an unstable nucleus

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Our Sun, an average star in the galaxy, uses the process of fusion to produce its energy. Every second, the Sun converts 600 million tons of matter into--

Back

electromagnetic energy

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What is radioactivity?

Back

The process by which unstable atomic nuclei lose energy by emitting radiation.

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What is half-life?

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The time required for half of the radioactive atoms in a sample to decay.

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What is nuclear fusion?

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A process where two light atomic nuclei combine to form a heavier nucleus, releasing energy.

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What is nuclear fission?

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A process where a heavy atomic nucleus splits into two or more lighter nuclei, releasing energy.

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What is an isotope?

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Atoms of the same element that have the same number of protons but different numbers of neutrons.