Question

An alpha particle is:

a hydrogen atom
a nucleus of helium
two neutrons
an electron

Answer 1

a nucleus of helium

this is right

Step-by-step explanation:

Answer 2

Answer: a nucleus of helium

Step-by-step explanation:

An alpha particle is a positively charged nucleus of a HELIUM-4 atom (consisting of two protons and two neutrons), emitted as a consequence of radioactivity;

It can be written as α-particle.