During which radioactive decay process does a nucleus lose 2 neutrons and 2 protons?

Question

A) Gamma Decay

B) Beta decay (positron)

C) Alpha decay

D) Beta Decay (electron)

Answer 1

If the 2 neutrons and 2 protons are stuck together after being emitted by the nucleus, you have emission of an alpha particle, so this is alpha decay.  Answer (C) is correct.