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The elements P (atomic weight 39) and Q (atomic weight 80) contain 20 and 45 neutrons respectively in their nucleus .

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The elements P (atomic weight 39) and Q (atomic weight 80) contain 20 and 45 neutrons respectively in their nucleus .Give their electronic arrangements separately. Also give their position in the modern periodic table

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Z=19   1s2 ,2s2 ,2p6 ,3s2 ,3p6 ,4s1    

P-4th,       G-1st

Z=35   1s2 ,2s2 ,2p6 ,3s2 ,3p6 ,4s2 ,3d10,4p5 . 

P-4th,        G-17th

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