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Bohr Model of Atom – Class 11 Chemistry Chapter 2 Notes

Bohr Model of atom:             Neil Bohr in 1913 put forward a theory to develop atomic model and to overcome shortcomings of Rutherford model. Bohr theory has following postulates. Electrons revolve around the nucleus in fixed orbits (i.e. orbits of particular radii). Each orbit or shell is associated with a definite amount of energy. Electrons …

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Rutherford Atomic Model- Alpha Scattering Experiment

Rutherford Atomic Model:   In 1911, Lord Rutherford made an experiment to construct an atomic model. He took a thin gold foil and bombarded it with α-particles. Gold foil was surrounded by photographic film . Rutherford’s Observations: He observed in alpha scattering experiment that : Most of α-rays passed through gold foil un-deflected.                                                                                                Only a …

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Formation of Ammonium ion (NH4+) -Coordinate Covalent Bond #ChemicalBonding

How is NH4+ ion formed? Formation of Ammonium ion: When ammonia (NH3) combines with H+ ion, results in the formation of Ammonium ion through a coordinate covalent bond. In ammonia, Nitrogen is a central atom having 5 electrons in its valence shell,3 electrons are shared with 3-H atoms and 1 lone pair of electrons complete …

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