When high energy alpha-particle ( ${}_{2}^{4}{He}$ ) pass through nitrogen gas, an isotope of oxygen is formed with the emission of particles named x. The nuclear reaction is ${}_{7}^{14}N + {}_{2}^{4}{He} \to {}_{8}^{17}O + x$
What is the name of x?

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electron

proton

neutron

positron

answer is B.

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Detailed Solution

The charge number and the mass number must be the same on both sides of a nuclear reaction. Particle x must have charge number +1 and mass number 1. Hence it is a proton.

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