The alpha particle consists of

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2 neutron and 2 proton

2 electron and 2 proton

4 neutron and 2 proton

1 neutron and 1 proton

answer is A.

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Detailed Solution

The alpha particle consist of 2 neutron and 2 proton. Alpha particles are composite particles identical to the nucleus of a helium-4 atom inclusive of two protons and two neutrons tightly bound together. They're emitted from the nucleus of a few radionuclides during a form of radioactive decay, known as alpha decay. The heavy unstable atom disintegrate in form of alpha particle to gain stability.

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