Question

Which of the following notations represents an alpha particle?

A. 2 He
C.B+
В. В
D. Y

Answer 1

A. 2 He

Step-by-step explanation:

The notation of an alpha particle is depicted as:

₂He

An alpha particles is a nucleus of 2 protons and 2 neutrons. So it is actually a Helium cation.

Alpha particles are monoenergetic and they mostly have discrete energy.

So, the mass number of the particle is 4 and atomic number is 2