Check sibling questions

The electronic configuration of an element ‘X’ is 2, 8, 6. To which group and period of the modern periodic table does ‘X’ belong. State its valency and justify your answer in each case.

 

Answer

Electronic configuration of X = 2, 8, 6

Group number = 10 + Number of electrons in outermost shell = 10 + 6 = 16

Since there are 3 shells, it belongs to the 3rd period.

X has a tendency to accept 2 electrons in order to attain noble gas configuration i.e. 2,8,8. Therefore, the valency of X is 2.

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CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo