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				   why 1S2,2S2P6,3S2P6d10,why at last we are cannot take again4S2

6 years ago


Answers : (1)


3d10 orbital posses more energy than 4s2 orbital ........

therefore 4s2 orbital is filled first and 3d10 afterwards ......(follows aufbau principle , lower energy level fills first)


6 years ago

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