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Three features have marked the stunning development of science since seventeenth century. The firt and the most important is the Scientific attitude of mind which insists on objective resoning. It means that we cannot follow our beliefs blindly. The second feature is the Invention of Scientific Instruments for observations, experiments and measurement. The third feature is the Effective use of Mathematics…                                                It is necessary to educate youth in modern science, without education they will find this world incomprehensible. They cannot be good citizens unless they are aware of the values which underline human beliefs, motives and conduct. In this troubled period of human history, religion and humanities ...

Introduction Neil   Bohr in (1913-1915) put forward his atomic theory.                                      Postulates   Of   Bohr’s   Atomic Theory ·         The electrons revolve around the positively charged nucleus in circular path called as shells or energy levels or stationary states. ·         Each energy level   or shell has its own fixed energy. ·         Electrons do not posses their own energy, the energy of their respective shells is their energy. ·         Electrons when absorbs energy in the form of quanta it will jump from lower energy level to higher energy level   and when it emits energy it will jump from higher ...