Question

When does en element become a different element?

A. When radiation is emitted
B. Only when the number of protons in the nucleus changes
C. Only when the number of electrons in the outer shell changes
D. When the number of neutrons in the the nucleus decreases

Answer 1

The answer is A"When radiation is emitted:

Hope this helped !! :)

Answer 2

the answer is D. at least im pretty sure...