α-particles are doubly-charged helium ions.

True

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False

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Solution

The correct option is A True
True, α-particles consist of two protons and two neutrons. They are doubly-charged helium ions. Since they have a mass of 4 u, the fast-moving α-particles have a considerable amount of energy.

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α-particles are doubly-charged helium ions.

The correct option is A TrueTrue, α-particles consist of two protons and two neutrons. They are doubly-charged helium ions. Since they have a mass of 4 u, the fast-moving α-particles have a considerable amount of energy.

The correct option is A True
True, α-particles consist of two protons and two neutrons. They are doubly-charged helium ions. Since they have a mass of 4 u, the fast-moving α-particles have a considerable amount of energy.