Rakesh thought what would happen, when performing the alpha-particle scattering experiment by using a thin sheet
Rakesh thought what would happen, when performing the alpha-particle scattering experiment by using a thin sheet of solid hydrogen in place of the foil. Hydrogen is a solid at temperatures below 14 K. He contacted his friend Rajesh for its answer. Rajesh explained him that in such case, no large angle of scattering of alpha particle is possible. Because hydrogen atom is a proton having mass of only 1.67 x 10-27 kg, while mass of alpha-particle is 6.64 x 10-27 kg, i.e. four times of mass of proton so the scattering particle is more massive than the target nucleus, thus the alpha-particle would not bounce back for a head-on collision.
(a) What values are displayed by Rajesh ?
(b) The ground state energy of hydrogen atom is -13.6 V What are kinetic and potential energies of electron in this state ?
1 Answers
(a) The values dispiayed by Rajesh are :
(i) high degree of basic knowledge,
(ii) capability to convince someone, and
(iii) helping and caring nature
(b) Given: E= -13.6 eV
.'. In this state, kinetic energy o{ the electron,
K = - E = 13.6 eV
and potential energy of the electron,
U = 2E = 2 x (-13.6) = -27.2 eV