How to find atomic no. whose highest energy electron has quantum no. n=4 l=1 m=-1 s=+1/2
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look n is 4 that mean it is N orbit and l is 1 that mean it is p .. and it makes 4p then m is -1 means pz has 1 electron and and porbital has 5 e then it makes 4p5 that is the last configuration of bromine hence it has atomic no 35
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