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What are the main features of quantum mechanical model of an atom |
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Answer» Solution :(1) The energy of electrons in an ATOMS is quantised. (2)The EXISTENCE of quantized electrons energy levels is a direct results of the like properties of electrons.The solutions of schrodinger WAVE equation gives the allowed energy levels(orbitals). (3)According to Heisenberg.s uncertainty principle,the exact position and momentum of an electron cannot be determined with absolute accuracy.As a consequence,quantum mechanics introduced the concept of orbital.Orbital is a three dimensionalspace in which the probality of finding the elctron is maximum. (4)The solution of Schrodinger wave equation for the allowed energies of an atom gives the wave FUNCTION `Psi`,which represents an atomic orbital.The wave nature of electron present in an orbital can be well defined by the wave function `Psi`. (5)The wav e function `Psi` itself has no physical meaning.However,the probability of finding the electron in a small volume dx,dy,dz around a point(x,y,z) is proportional to`|Psi(x,y,z)|^(2)`dxdydz`|Psi(x,y,z)|^(2)` is known as probability and is always POSITIVE. |
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