Which of the following is a correct statement?
- ABeta rays are same as cathode rays
- BGamma rays are high energy neutrons
- CAlpha particles are singly ionized helium atoms
- DProtons and neutrons have exactly the same mass
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$A$ radioactive nuclide of element $X$ decays to form element $Y$. The graph representing the rate of production of $Y$ in a sample of $X$ is:
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When $_{90}Th^{238}$ transforms into $_{83}Bi^{222}$,the number of $\alpha$ and $\beta$ particles emitted are:
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Neutrino is a particle which $\qquad$
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