Engineering :: Nuclear Engineering
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A radioactive substance gives off Y-rays when
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[A]. |
its nucleus goes from a higher energy state to a lower one | [B]. |
one of the orbital electrons jumps from a higher orbit to one of a lower energy
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[C]. |
an orbital electron jumps from a lower orbit to a higher one | [D]. |
its nucleus goes from a lower energy state to a higher one |
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