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.

 

Answer

Electronic configuration = 2,8,6

Number of valence electrons = 6

  • Group number = 10  + number of valence electrons = 10 + 6 = 16
  • Number of shells = 3, so it belongs to the 3rd period .
  • Since this element requires 2 electrons to attain noble gas configuration, its valency is 2.
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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo