Question

What the first nucleus hit with to initiate the fission reaction? is?

Answer 1

hi dear....

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Neutrons.

In a controlled nuclear fission reaction, the number of neutrons released is controlled to maintain the desired level of reaction.

hope it helps....

Answer 2

$\huge\bold\pink{hello!!}$

HERE IS UR ANSWER

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the first nucleus hit is neutron which is controled at desired level.