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uranium 235



Chem.
the radioactive uranium isotope having a mass number of 235, comprising 0.715 percent of natural uranium. When bombarded with neutrons it undergoes fission with the release of energy. Also called U-235, U 235, actinouranium.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

uraniumuranium 238
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