Question

Process in which two light nuclei combine to form a heavy nucleus is called

Answer 1

Atomic radiation is the process in whichtwo light nuclei combine to form a heavy nucleus

Answer 2

Explanation:

When two small nuclei combine together and results in the formation of a larger nuclei then this process is known as fusion.

For example, $^{2}_{1}H + ^{3}_{1}H \rightarrow ^{4}_{2}He + ^{1}_{0}n$

Fusion is a nuclear reaction. There is also release of energy in a fusion reaction.  

Therefore, there is a change in mass number and atomic number in both reactant and product side.