Question

What is the composition of alpha particles?

This question has multiple correct options
A

A positive charged

B

Doubly ionised helium nuclei

C

A stream of neutrons

D

Helium atoms

Medium

Solution

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Correct option is
A

A positive charged

B

Doubly ionised helium nuclei

Alpha particles are positively charged and are doubly ionised helium nuclei.

An alpha particle is a fast moving packet containing two protons and two neutrons (a helium nucleus). Alpha particles carry a charge of +2 and strongly interact with matter. Produced during alpha decay, alpha particles can travel only a few inches through air and can be easily stopped with a sheet of paper.

Hence, the correct options are and

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