What happens to the nucleus in the beta-minus decay? (4 points)

Question

In beta-minus decay the atomic number of the nucleus should increase by 1.

In beta-minus decay the atomic number of the nucleus should decrease by 1.

In beta-minus decay the nucleus should be unchanged.

In beta-minus decay the nucleus should have a negative charge added.

Answer 1

In beta-minus decay, the nucleus does not change, but an electron (beta particle) is emitted from the nucleus. Therefore, the atomic number of the nucleus increases by 1.