What are alpha particles?

Alpha particles are doubly charged hydrogen ions

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Alpha particles are doubly charged helium ions

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Alpha particles are single charged helium ions

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Alpha particles have no positive ion

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Solution

The correct option is B
Alpha particles are doubly charged helium ions

Alpha particles are doubly charged helium ions. Since they have a mass of 4 u, the fast-moving alpha particles have a considerable amount of energy.

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