Why electronic energy is taken as negative?(answer from second chapter class 11)
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52
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it's because when an electron is at infinite distance from nucleus, then there the kinetic energy of that electron can't be calculated. so, it is taken to be zero. that's why the electronic energy is taken as negative
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2
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As the electron gets closer to the nucleus (as n decreases), En becomes larger in absolute value and more and more negative. Hence, electronic energy is negative because energy is zero at infinite distance from the nucleus and decreases as the electron comes towards the nucleus.
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