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Q.

An alpha particle is also known as _________.

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a

a doubly-charged helium ion

b

subatomic particle

c

a neutral particle

d

negatively charged particles

answer is B.

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Detailed Solution

Explanation:

An alpha particle consists of two protons and two neutrons, making it a helium nucleus. It is called a doubly-charged helium ion because it has lost its two electrons, leaving it with a positive charge of +2. Alpha particles are emitted during radioactive decay of heavy elements like uranium or radium.

Final Answer

A doubly-charged helium ion

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