Question

The particle is emitted in alpha radiation is the same as a / an?

Answer 1

Answer: b. helium nucleus

Helium nucleus is the particle that is being emitted in an alpha radiation. This helium nucleus then transforms and becomes decays that are also known as alpha decays. The alpha particle maybe similar to helium nucleus however, it does not have electrons surrounding it. 

Answer 2

B. helium nucleus
hope that helps.