Atomic StructureHard

Question

Consider the following spectral lines for atomic hydrogen:

A. First line of Paschen series

B. Second line of Balmer series

C. Third line of Paschen series

D. Fourth line of Bracket series

The correct arrangement of the above lines in ascending order of energy is:

Options

A.D $<$ C $<$ A $<$ B
B.A $<$ B $<$ C $<$ D
C.C $<$ D $<$ B $<$ A
D.D $<$ A $<$ C $<$ B

Solution

$\Delta E = 13.6Z^{2}\left( \frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}} \right)$

$\ $ Series $$n_{1}$$ $$n_{2}$$
(A) Paschen $\left( 1^{\text{st~}} \right.\ $ line $)$ 3 4
(B) Balmer $\left( 2^{\text{nd~}} \right.\ $ line $)$ 2 4
(C) Paschen $\left( 3^{\text{rd~}} \right.\ $ line $)$ 3 6
(D) Bracket $\left( 4^{\text{th~}} \right.\ $ line $)$ 4 8

So correct ascending order of energy of above lines is : 4

Create a free account to view solution

View Solution Free
Topic: Atomic Structure·Practice all Atomic Structure questions

More Atomic Structure Questions

The speed of electron revolving around H-nucleus is 0.547 × 106 m/s. The distance of electron from the nucleus is...If the radius of first orbit of H–atom is x Å, then the radius of the second orbit of Li2+ ion will be...In the structure of ClF3, the number of lone pairs of electrons on central atom &#39;Cl&#39; is...Correct order of radius of the Ist orbit of H, He+, Li2+, Be3+ is :...For an atom or ion having single electron, compare the energies of the following orbitals.S1 = A spherically symmetrical...