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Berkelium is a synthetic element. It doesn't occur in nature because of its instability, so must be made in a laboratory.

Discovered by Stanley G. Thompson, Albert Ghiorso, Glenn T. Seaborg, Kenneth Street - in December 1949, at Berkeley Laboratory, University of California.

The nuclear reaction is:

24195Am + 42He → 24397Bk + 2 1n

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14y ago

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