Question

18 the three main types of decay are...
a alpha, beta, gamma
b alpha, beta, delta
c beta, delta, gamma
d alpha, delta, gamma

Explanation:

Radioactive decay has three main types. Alpha decay involves the emission of alpha particles. Beta decay involves the emission of beta particles. Gamma decay involves the emission of gamma rays. Delta is not one of the main types of decay.

Answer:

A. alpha, beta, gamma