The last element of the p-block in 6th period is represented by the outermost electronic configuration.

Question

Comprehension given below is followed by some multiple choice questions. Each question has one correct option. Choose the correct option. In the modern periodic table, elements are arranged in order of increasing atomic numbers which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, s, p, d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. In accordance with the Arfbau principle, the seven periods (1 to 7) have 2, 8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids are placed at the bottom of the main body of the periodic table.

The last element of the p-block in 6th period is represented by the outermost electronic configuration.

(i) 7s² 7p⁶

(ii) 5f¹⁴ 6d¹⁰ 7s² 7p⁰

(iii) 4f¹⁴ 5d¹⁰ 6s² 6p⁶

(iv) 4f¹⁴ 5d¹⁰ 6s² 6p⁴

Answer 1

(iii) 4f¹⁴ 5d¹⁰ 6s² 6p⁶