According to the Bohr theory, which of the following transitions will give rise to the most energetic photon? `qquad` (a) ["n=4" to "n=2],
b)[n=5" to "n=4],
c) n=3 to n=1
d)[n=6" to "n=5]

Which of the following electron transition in a hydrogen atom will require the largest amount of energy? (A) from n,=1 to n=2 (B) from n,=2 to n=4 (C) from n,=5 to "n=1 (D) from n=3 to n=5

According to Bohr's theory , the energy required for the transition of H atom from n = 6 to n = 8 state is

In hydrogen atom, wavelength of emitted photon will be minimum in which of the following transitions? (i) n = 2 to n = 1 , (ii) n=6 to n = 5 , (iii) n = 3 to n =2

Find the wavelength of the radiation by hydrogen in the transition (a) n = 3 to n = 2, n = 5 to n = 4 and n = 10 to n = 9

An electron of H-atom de-excites form energy level n_(1)=2 to n_(2)=1 and the emitted photon is incident on He^(+) ions In ground state and first excited states. Which oof following transition is possible. (A) n = 1 to n = 4 (B) n = 2 to n = 4 (C) n = 2 to n = 3 (D) n = 1 to n = 3

The transition of an electron from n_(2)=5,6 ….. To n_(1) =4 gives rise to

Given the notation for the sub-shell deotected by the following quantum number a. n = 5, l = 2 b. n = 6 , l= 3 c. n = 4 ,l = 0 d n = 5,l = 4

Prove the following by the principle of mathematical induction: 1.3+2.4+3.5++(2n-1)(2n+1)=(n(4n^(2)+6n-1))/(3)

If the sum of n terms of an A.P. is 2n^2+5n , then its n t h term is 4n-3 (b) 3n-4 (c) 4n+3 (d) 3n+4