Nuclei — MP Board Class 12 Physics Important Questions & Revision Notes

$R \propto A$

$R \propto A^{1/3}$

$R \propto A^{2/3}$

$R \propto A^{-1/3}$

$10^9 \text{ kg/m}^3$

$10^{12} \text{ kg/m}^3$

$10^{17} \text{ kg/m}^3$

$10^{24} \text{ kg/m}^3$

931.5 MeV

93.15 MeV

9.315 MeV

931.5 eV

$A = 2$

$A = 56$

$A = 100$

$A = 240$

Long range and electrostatic

Short range and attractive

Gravitational and repulsive

Weak and long range

A proton converts into a neutron

A neutron converts into a proton

Mass number increases by 1

Atomic number decreases by 1

Marie Curie

Ernest Rutherford

Henri Becquerel

J.J. Thomson

$T_{1/2} = \lambda \ln 2$

$T_{1/2} = \frac{0.693}{\lambda}$

$T_{1/2} = \frac{\lambda}{0.693}$

$T_{1/2} = \frac{1}{\lambda}$

Shell model

Liquid drop model

Bohr's model

Thomson's model

Moderator

Control rod

Fuel

Coolant only