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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 stay healthy

How to stay healthy

Health is wealth. So, it is very important to stay healthy. To keep in good health, we should go to bed early and get up from our bed. Then, we have to brush our teeth, wash our hands and face. We should use good soap to wash. We should not eat anything from the roadside vendors who always keep the food uncovered. We must keep our nails clean and short. It is a must for us to play outdoor games or to work in our personal garden in the afternoon. Be regular in taking our meals in time.

Smoking causes serious harm to us. So, we must avoid smoking at any cost. We should always drink enough pure water and eat the necessary fruits and vegetables. Always we have to try to use clean clothes. Finally, we must keep our environment clean and safe.

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