1.

Electronic configuration of an elem ent of the m odern periodic table i s ............ Is^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(4) What will be atomic number of the element immediately below it, in the same group ?

Answer»

18
34
48
24

Solution :Given CONFIGURATION : `Is^(2) 2s^(2)2p^(6) 3s^(2)3p^(4)` It has total electrons = 16 = Z The element is S of 3rd ROW and 16th group the element below it is Se of 4th row and group with Z - (16 + 18) = 34


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