Rutherford proposed the atomic meodel after his most stiking experiment an apha-scattering leading to discoveluy of nucleus . Bohr later on modified the atomci model on the balis of Planck's quantum theory of light and prosed the concept of stateonry cireclar orbits of quanise enrgy(nh) /( 2pi) The colloection of fine lines in line spectrum led Sommerfeld to gae the idea fo elliptical orbits .He successfully explained the existence fo subshells and their number in a shell . The angular momentum of subshells was proposed assqrt ( l(l +120)) . h/( 2 pi) . The emission of a spectral line in atomic spectra was supposed to be due to the jump of elecrtron from one enrgy level to other . The ninumum enrgy is given out when an elecrton jumps form one obit to oter form :

Rutherford proposed the atomic meodel after his most stiking experimen

1.	Rutherford proposed the atomic meodel after his most stiking experiment an apha-scattering leading to discoveluy of nucleus . Bohr later on modified the atomci model on the balis of Planck's quantum theory of light and prosed the concept of stateonry cireclar orbits of quanise enrgy(nh) /( 2pi) The colloection of fine lines in line spectrum led Sommerfeld to gae the idea fo elliptical orbits .He successfully explained the existence fo subshells and their number in a shell . The angular momentum of subshells was proposed assqrt ( l(l +120)) . h/( 2 pi) . The emission of a spectral line in atomic spectra was supposed to be due to the jump of elecrtron from one enrgy level to other . The ninumum enrgy is given out when an elecrton jumps form one obit to oter form :
Answer» 2 to 1 3 to 2 4 to 3 5 to 4 Solution :`E_5 -E-4` is ninimum as ` E_n = E-1 n_^2`.