Q.

The nuclear particle having no mass and no charge, but only spin is -

A. proton
B. neutrino
C. meson
D. electron
Answer» B. neutrino
Explanation: Neutrinos do not carry electric charge, and have mass quite small, though non- zero. Their mass is tiny even by the standards of subatomic particles. They are electrically neutral, weakly interacting elementary subatomic particles with half-integer spin.
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