Question

Isotopes of hydrogen react, forming the element helium, as shown.

Answer 1

Answer:

B. nuclear fusion

Explanation:

Atomic fusion is a process in which two or more lighter nuclei combine to form a heavier nucleus.

The mass of the single nucleus thus formed is lighter than the initial mass.

There is a difference in mass in the heavier nucleus thus formed. According to Einstein's mass-energy equation, the change in mass is equated towards energy.

The energy liberated in the process is called as thermo-nuclear energy.

As in the case of isotopes of hydrogen fuses to form helium, the nuclear reaction is given by relation

₁H³  +   ₁H² →   ₂He⁴   +   ₀n¹    +    energy

Thus, the nuclear reaction of hydrogen isotopes forming helium is nuclear fusion.