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ExplainAufbau principlewith example |
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Answer» Solution :The wordaufbauin Germanmeansbuildingup L the building up of orbitals meansthe fillingup oforbitalswithelectrons <BR> Principle :in thegroundstateof the atomtheorbitlasare filled inorderof theirincreasingenergies. Orderof orbitalsare filled :1s , 2s,2p3s, 3p , 4s ,3d,4p5s , 4D , 5p , 6s , 4f , 5d , 6p , 7S Firstlowerenergyorbitalscompletelyfilledthanafterotherorbitalsarefilled.The capacityoforbitalsforelectronis asfollows  Ex : Be (z=2)electronconfiguration`1s^(2) 2s^(2)P (z=9)` electronconfiguration `1s^(2)2s^(2) 2P^(5)` Br (z=35)arrangementof electronas under `1s^(2) 2s^(2) 2p^(6) 3s^(2)4s^(2) 3d^(10)4P^(5)` etc |
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