In the Sun,the important source of energy is

When two deuteron nuclei fuse to form a helium nucleus,energy is released because the mass of the helium nucleus is .....

Identify the type of nuclear process given below:
$4\,_{1}H^{1} \to \,_{2}He^{4} + 2\,_{1}e^{0} + 2\nu + 26\,MeV$

Which of the following is a nuclear fusion reaction?

How much energy is released by the fusion of four hydrogen atoms to form a helium nucleus (in $MeV$)?

Imagine that a reactor converts all given mass into energy and that it operates at a power level of $10^9\, W$. The mass of the fuel consumed per hour in the reactor will be: (velocity of light,$c = 3 \times 10^8\, m/s$)