Spectral Hydrogen Atom, Physics, Basic Statistics

Assignment Help:
Long before Bohr gave his theory of hydrogen atom, various scientists had observed experimentally, the spectral series of hydrogen atom. Bohr offered a theoretical explanation of these spectral series as follows:

1. Lyman series: Bohr postulated Lyman series is obtained when an electron jumps to the first orbit (n1 = 1) from any outer orbit (n2 = 2, 3, 4……).

Wave numbers of spectral lines Lyman series were calculated by

v? = R [1/12 – 1/k2], where k = 2, 3, 4…

These values of v? lie in the ultra violet region of the spectrum and agree well with the values of v? observed experimentally by Lyman.

2. Balmer series: according to Bohr, Balmer series is obtained when an electron jumps to the second orbit (n1 =2) from any outer orbit (n2 = 3, 4, 5…..).

Wave numbers of these spectral lines were calculated as

v?= R [1/22 – 1/k2], where k = 3, 4, 5…..

This set of spectral lines lie in the visible part of the spectrum.

3. Paschen series: according to Bohr, Paschen series is obtained when an electron jumps to the third orbit (n1 =3) from any outer orbit (n2 = 4, 5, 6…) Bohr calculated the wave numbers of spectral lines of Paschen series from the relation:

v?= R [1/32 – 1/k2], where k = 4, 5, 6……

These values of v? lie in the infra red region of the spectrum and agree well with values of v? observed experimentally by Paschen.

Bohr also predicted two new series in the infra red region of the spectrum, which were observed later by Brackett and Pfund.

4. Bracket series: according to Bohr, Brackett series is obtained when an electron jumps to the 4th orbit (n1 = 4) from any outer orbit (n2 = 5, 6, 7……)

5. Pfund series: according to Bohr, is obtained when an electron jumps to the 5th orbit (n1 =5) from any outer orbit (n2 = 6, 7, 8…….)

The origins of various spectral series of hydrogen atom are represented by table under which gives the longest and the shortest wavelengths of some of the spectral series of hydrogen atom.

Related Discussions:- Spectral Hydrogen Atom, Physics

Manufacturing overhead referred to as factory overhead, Manufacturing overh...

Manufacturing overhead referred to as factory burden, factory overhead, and manufacturing support costs refers to indirect factory related costs which are incurred when a product i

Difference between an unadjusted trial balance and an adjust, Difference be...

Difference between an unadjusted trial balance and an adjusted trial balance? The variations between unadjusted test stability and altered test stability are the amounts registe

Ifrs financial instruments, journal entries of a loan swap with different c...

journal entries of a loan swap with different currency

Accounting equation, goods returned by a customer Rs 2000 costing Rs 1900

goods returned by a customer Rs 2000 costing Rs 1900

How many trucks get washed between smokes, A. Northbound trucks leaving Hel...

A. Northbound trucks leaving Helmand Province with USMC communications equipment must go through a washing process before getting underway, so as to prevent Tajikistan from gett

Projectile motion, A fox fleeing from a hunter encounters a 0.730 m tall fe...

A fox fleeing from a hunter encounters a 0.730 m tall fence and attempts to jump it. The fox jumps with an initial velocity of 7.10 m/s at an angle of 45.0°, beginning the jump 2.1

Quartiles and percentiles, Quartiles and Percentiles Percentile can ...

Quartiles and Percentiles Percentile can be explained as : a measure this tells us what is the percent of the total frequency scored at or below the measure. Quartiles

Frequency distribution, What happens to the arithmetic mean when you add th...

What happens to the arithmetic mean when you add the same number to all the scores of the distribution?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd