question_answer

Taking the example of an element of atomic number 16, explain how the electronic configuration of the atom of an element       relates to its position in the modern periodic table and how valency of an element is calculated on the basis of its atomic number.

Answer:

(a) Electronic configuration = 2, 8, 6

(b) Period = 3 since it has 3 shells

Group = 16 Since no. of valence electrons are 6.

Valency = \[86=2\]