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

Apoorv Jain , 14 Years ago
Grade 11
anser 1 Answers
pawan deep

Last Activity: 14 Years ago

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)

832_12765_orbfilling.gif

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