The mass of a neutron is nearly equal to the mass of the proton.

Q. Assuming that the mass of proton is nearly equal to mass of neutron the minimum kinetic energy in $101\text{eV}$ of a neutron for inelastic head on collision with a ground state hydrogen atom at rest is

Q. A proton (mass 1.67 x ${10}^{-27}$ kg) on striking a neutron (mass nearly equal to the proton ) forms a deutron. What would be the velocity of the deutron if it is formed by a proton moving left with a velocity of 7.0 x 10${}^6$ m/s and a neutron moving right with a velocity of 4.0 x 10${}^6$ m/s

Q. Neutrons are ________ particles having a mass equal to that of protons.