LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
in Quantum Mechanical Model of Atom by (46.8k points)
closed by

Describe about Bohr atom model.

1 Answer

+1 vote
by (47.8k points)
selected by
Best answer

Assumptions of Bohr atom model. 

i. The energies of electrons are quarantined 

ii. The electron is revolving around the nucleus in a certain fixed circular path called stationary orbit.

iii. Electron can revolve only in those orbits in which the angular momentum (mvr) of the electron must be equal to an integral multiple of h/2π 

mvr = nh/2π, where n = 1,2,3,…etc.,

iv. As long as an electron revolves in a fixed stationary orbit, it doesn’t lose its energy. But if an electron jumps from higher energy state (E2 ) to a lower energy state (E1 ), the excess energy is emitted as radiation. The frequency of the emitted radiation is E2 – E1 = hv. 

∴ v = (E2 – E1) / h

Conversely, when suitable energy is supplied to an electron, it will jump from lower energy orbit to a higher energy orbit.

v. Bohr’s postulates are applied to a hydrogen like atom (H, He+ and Li2+ etc..) the radius of the nth orbit and the energy of the electron revolving in the th orbit were derived.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.