The nuclear reactor at Kaiga is a

$_1H^1 + _1H^1 + _1H^2 \to X + _{+1}e^0 + \text{energy}$. The emitted particle $X$ is:

The number of neutrons released when ${}_{92}^{235}U$ undergoes fission by absorbing ${}_{0}^{1}n$ and products ${}_{56}^{144}Ba$ and ${}_{36}^{89}Kr$ are formed,is:

In a nuclear reactor,the function of the moderator is to decrease

When neutrons are bombarded on the nucleus of $_{92}^{235}U$,the number of emitted neutrons is typically

The best neutron moderator is: