Size of nucleus is of the order of

Is nuclear force short range or long range ?

If the nuclear radius of ${}_{13}^{27}Al$ is $3.6$ fermi the approximate nuclear radius of ${}_{}^{64}Cu$ in fermi is ..........$fm$

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.

Assertion : The binding energy per nucleon, for nuclei with atomic mass number $A > 100$, decreases with $A$.

Reason : The nuclear forces are weak for heavier nuclei.

Antiparticle of electron is