Question

Explain Bohr's model of an atom.

Answer 1

Neils Bohr gave atomic model in 1913.The main points of this model are:

1) An atom consists of a central positive part called the nucleus which contains all the protons and neutrons.

2) Electrons which are present outside the nucleus revolve around the nucleus in definite circular paths called orbits or shells.

3) Each orbit has a fixed energy and the orbitals are represented by the symbols K, L,M, N etc or by the numbers 1,2,3 …

4) Each orbit can accommodate not more than a fixed number of electrons.

5) Electrons moving in the same orbit donot lose or gain energy.

6) Electrons lose energy on jumping from a higher orbit to lower one and vice-versa.

Answer 2

Step-by-step explanation:

BOHR ATOMIC MODEL:

Atom has a central called nucleus .

Electron revolve only in fixed circular orbit with fixed energy and fixed velocity.

Second point based on rule Quantization Condition that is :

Electron revolve only those circular orbit for which angular momentum is integral multiple of h / 2pie

Where h is plank constant.

3 While revolving the electrostatic force of attraction on between electron and nucleus provide centripetal force.

4 While revolving in particular orbit and electron nither gain energy nor loose energy .

Energy of an orbit / shell is fixed.

So he has gave name of an orbital : Stationary energy level

K n = 1

L n = 2

M n = 3

N n = 4

Note : Stationary means it's energy cannot be change .

5 Electron can accept energy and can loose energy .

But and But ......

There is condition in that ..

i If the electron accept an energy , it jump to higher energy level means excitation of electron .

ii If an electron , loose energy it return back to lower energy level means dexcatation of electron.

NOTE:

Electron gain or loose only those energy which are to difference in two energy level.

Thank you