Question

energy release quick check
which statement about the balanced equations for nuclear and chemical changes is correct? (1 point)
a nuclear equation is balanced according to mass number. a chemical equation is balanced according to the number of atoms before and after the change.
a chemical equation is balanced according to mass number. a nuclear equation is balanced according to the number of atoms before and after the change.
both are balanced according to the number of atoms of each element before and after the change.
both are balanced according to the total mass before and after the change.

Explanation:

In nuclear reactions, equations are balanced by ensuring the mass - number is conserved. In chemical reactions, equations are balanced by making sure the number of atoms of each element is the same before and after the reaction.

Answer:

A. A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the number of atoms before and after the change.