Question

An atom ‘A’ has the electronic configuration 2, 8, 6.
(i) What is the atomic number of element ‘A’?
(ii) Will it be larger or smaller in size than element ‘B’ (Atomic number = 14)? Why?
(iii) To which of the following elements would it be chemically similar? Why?
O(8), C(6), N(7), Ar(18)

Answer 1

(i) Atomic number of A is 16
(ii) A is smaller in size than B. Atomic size decreases in moving from left to right in a period.
(iii) A would be chemically similar to O because Both belong to are of the same group in the periodic table.