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In $α$ -particles, the number of protons and electrons are

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0, 2

2, 4

2, 2

2, 0

answer is C.

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Detailed Solution

α - particles - {He}^{+ 2}

He – atomic number = 2

Mass number = 4

No. of protons = 2.(Is equal to the atomic number)

No. of electrons = 0.

Because it lose the $2 \bar{e}$ and it gains the +2 ve charge.

Alpha particle is doubly ionised He atom or He Nucleus.

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