Physics - Modern Physics Question with Solution | TestHub

Alpha particles are composite particles consisting of two protons and two neutrons tightly bound together. They are emitted from the nucleus of some radionuclides during radioactive decay, called alpha-decay.

$\alpha$ particle ${\to }_2{\mathrm{He}}^4$

No. of protons $\to 2$

No. of neutrons $\to 4-2=2$