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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ravi bhushan
Here is the detailed solution.
Sir how delta J is 1 because j for He(2,6)is 0 and for Li(3,6)is 3+
then transition is not allowed.
sorry I have not find j value separately.
Wait for sometimes. I am solving.
Now you can see the correct answer.