Question

Rutherford used alpha particles in his experiment. The charge of alpha particles is _________.

• A. -2
• B. +2
• C. -1
• D. +4

Answer 1

The correct option is B +2

An alpha-particle is identical to the nucleus of a normal helium atom i.e., $H{e}^{2+}$.
Alpha particles consist of two protons and two neutrons. Protons are positively charged and neutrons are neutral in nature.
Hence, the charge of alpha particles is +2.