Recent Post

Bohrs Atomic Model

Bohrs Atomic Model Scientist Neils Bohr gave some corrections to Rutherford's atomic model in 1913. This corrected model is called the Bohr's atomic model. The main postulates of this model are - a) The electron moves around the nucleus in a circular motion, about an axis. This circular motion is called an energy level or orbit. They are also known as the shell or permanent orbit or principal energy level. Electrons do not absorb or emit any energy when they revolve these fixed orbits. If we express the permanent orbit as n, then n = 1, 2, 3, 4, etc.  In other words, if n = 1, the principal energy level is K,  when n = 2, L is the principal energy level,  when n = 3, M is the principal energy level,  when n = 4, N is the principal energy level, etc. b) According to Bohr's model, the angular momentum of an electron in an energy level is mvr =  nh / 2𝜋 . Here, m = the mass of the electron (9.11×10 -31  kg) r = the radius of the orbit that the electron follows v = the veloc

How to make a telephone call

How  to make a telephone call

To make a phone call, first of all, I have to lift the receiver. If I have the dial tone (a continuous sound). I dial the number I want. The person at the other end of the wire will say 'Hello', Then, I have to ask: Could I speak to so and so?' The person will reply: 'Speaking and I have to tell him/her what I want to say. 

Thus, a phone call is made.

You may like

Comments

Popular Posts

What is biological coin?

The Importance of Information and Communication Technology

When you open the gas cylinder used for cooking, which action takes place first diffusion or effusion?

The reason of higher rate of photosynthesis of lily plant than wheat plant.

Simple distillation

Hardware and software

Explain the acceleration of an object moving in a circular path.

What is hydrocarbon?