A nucleus at rest splits into two nuclear parts having same density and the radii in the ratio $1 : 2$ . Their velocities are in ratio ———
$2 : 1$
$4 : 1$
$6 : 1$
$8 : 1$
Is nuclear force short range or long range ?
Order of magnitude of density of uranium nucleus is $({m_p} = 1.67 \times {10^{ - 27}}kg)$
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.
Assertion : Isobars are the elements having same mass number but different atomic number.
Reason : Neutrons and protons are present inside nucleus.
The mass number of a nucleus is