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Find number abc

If 99cb5 + a5ca9 = caa32a find number abc. Multiple solutions may exist.

Correct answers: 7

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Radioactive synthesis

In 1936, the first radioactive substance to be produced in the U.S. synthetically was radium E, by bombarding the element bismuth with neutrons. This was achieved by Dr. John Jacob Livingood at the University of California at Berkeley.

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