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While filling up of electrons in the atomic orbitals, the 4s orbital is filled before the 3d orbital but the reverse happens during the ionisation of the atom. Explain why?
Answers (1)
While electrons are filled according to rule (which is lower for
than
, they leave according to the ionisation enthalpy. 4s electrons, being further from nucleus, are more loosely held and are removed.
View full answer
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