Question

In a nuclear reaction, which of the following does NOT have to be conserved?

A. Mass alone.
B. Energy alone.
C. The number of electrons.
D. The combination of mass and energy.

chek all that applys.

Answer 1

The mass doesn't have to be conserved. A little bit of the mass is "converted" into the kinetic energy according to the mass-energy equivalence formula.

Answer 2

A B C. only the mass and the mass equivalent of energy together are conserved.