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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

Write simple instructions on 'Washing clothes'.

Write simple instructions on 'Washing clothes'.

Dirty clothes are washed through a number of stages. At first, soap pieces or soap powder are mixed with clean water. Then dirty clothes are dipped in the mixture. It is left for 30 - 40 minutes. Next, it is scrubbed and rinsed. After that, it is dried in the sun. Then it is pressed or ironed. Now it is made ready for wear. Thus, we see washing clothes is not very difficult and we can make it ourselves.

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