Which of the Following Is True About Radioactive Decay

Multiple Choice

Which of the following is true about radioactive decay?

A) Once a nucleus begins to decay it is destroyed.
B) A helium atom was the first particle identified as a product of radioactive decay.
C) Gamma decay depends on chemical reactions.
D) Alpha decay results in one less neutron and one more proton.
E) After beta decay, the number of protons in a nucleus is unchanged.