Answer:
Alpha particles (a) are composite particles consisting of two protons and two neutrons tightly bound together (Figure 1). ... An alpha-particle is identical to the nucleus of a normal (atomic mass four) helium atom i.e. a doubly ionised helium atom.
Explanation:
How Alpha particles are formed?
An alpha particle is produced by the alpha decay of a radioactive nucleus. Because the nucleus is unstable a piece of it is ejected, allowing the nucleus to reach a more stable state. ... An interesting thing about alpha particles is that they do not penetrate far through matter (unlike beta or gamma radiation).
