The mass of a neutron is the same as that of
A proton
A meson
An epsilon
An electron
Show that the volume of nucleus is proportional to its atomic mass number.
Assertion $(A):$ Forces acting between proton-protn $\left(f_{p p}\right)$, proton-neutron $\left(f_{p p}\right)$ and neutron-neutron $\left(f_{n n}\right)$ are such that $f_{p p} < f_{p n}=f_{n n}$
Reason $(R):$ Electrostatic force of repulsion between two protons reduces net nuclear forces between them.
Mention the total charge of electron in the atom.
$\pi $ mesons can be
The nuclei of which one of the following pairs of nuclei are isotones