What are moderators?

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,

What are the characteristics of a moderate balaned diet?

The moderator used in nuclear reactor is

Which material is used as a neutron moderator-

A substance used as a moderator in nuclear reactors is

Substance used as a moderator in nuclear reactor is-

Give an example of a moderator used in nuclear reactor.

Which allotrope of carbon is used as a moderator in the nuclear reactor?

An isotope of hydrogen reacts with oxygen to give compound (A), which is used as a moderator in nuclear reactor. Like hydrogen, this isotope also undergoes addition reaction. It reacts with ethylene to give compound B, which is a saturated hydrocarbon. Identify the element A and B. A is radioactive.

What are spontaneous reactions? What are the conditions for the spontaneity of a process?