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

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Solution

The correct option is A 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.

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