The mass defect per nucleon is called

(1) Binding energy             

(2) Packing fraction

(3) Ionisation energy         

(4) Excitation energy

Nuclear forces are

(1) Short ranged attractive and charge independent

(2) Short ranged attractive and charge dependent

(3) Long ranged repulsive and charge independent

(4) Long ranged repulsive and charge dependent

Antiparticle of electron is

1. ${}_0\mathrm{n}_1$               

2. ${}_1\mathrm{H}_1$

3. Positron       

4. Neutrino

The binding energy per nucleon is maximum in the case of

(1) ${}_4{}^2\mathrm{He}$                 

(2) ${}_{26}{}^{56}\mathrm{Fe}$

(3) ${}_{56}{}^{141}\mathrm{Ba}$               

(4) ${}_{92}{}^{235}\mathrm{U}$

Isotopes are atoms having 

1. Same number of protons but different number of neutrons

2. Same number of neutrons but different number of protons

3. Same number of protons and neutrons

4. None of the above

The mass of an $\mathrm{\alpha }$-particle is:

Atomic number of a nucleus is Z and atomic mass is M. The number of neutron is

(1) M-Z           

(2) M

(3) Z               

(4) M+Z 

The $\mathrm{\alpha }$-particle is the nucleus of an atom of

(1) Neon             

(2) Hydrogen

(3) Helium           

(4) Deuterium

The force acting between proton and proton inside the nucleus is 

(1) Coulombic             

(2) Nuclear

(3) Both                       

(4) None of these

For a nucleus to be stable, the correct relation between neutron number N and Proton number Z is

(1) N > Z             

(2) N = Z 

(3) N < Z             

(4) N$\ge$Z