When two nuclei $$(A \le 10)$$ fuse together to form a heavier nucleus, the
A
binding energy per nucleon increases.
B
binding energy per nucleon decreases.
C
binding energy per nucleon does not change.
D
total binding energy decreases.
Correct option is A. binding energy per nucleon increases.
Since the two nuclei fuse together to from a stable heavier nucleus, the heavier nucleus will be more stable that the two nuclei. So, the binding energy of the heavier nucleus is greater than the binding energy of the two nuclei.
Option (A) is correct.