The hydrogen bomb is based on the phenomenon of:

The phenomenon of radioactivity arises from the

For nuclear fusion reactions, the fusion temperature is of the order of

The energy released in an atom bomb explosion is mainly due to

Calculate the mass defect in the following nuclear reaction:
$_1H^2 + _1H^3 \to _2He^4 + _0n^1$
(Given: mass of $_1H^2 = 2.014 \ amu$,$_1H^3 = 3.016 \ amu$,$_2He^4 = 4.004 \ amu$,$_0n^1 = 1.008 \ amu$) (in $amu$)

If the mass defect of ${ }_{5}^{11}B$ is $0.081 \ u$, its average binding energy (in $MeV$) is