Question

In a nuclear reactor, moderators slow down the neutrons
which come out in a fission process. the moderator used
have light nuclei. Heavy nuclei will not serve the purpose,
because
(a) they will break up
(b) elastic collision of neutrons with heavy nuclei will
not slow them down
(c) the net weight of the reactor would be unbearably high
(d) substances with heavy nuclei do not occur in liquid
or gaseous state at room temperature

Answer 1

Explanation:

I don't no your question

Answer 2

Answer:

elastic collision of neutrons with heavy neclei will not slow down