Question

State whether the following statements are True or False :
The $6^{th}$ period is the longest period in the modern periodic table.

Answer 1

The first period of the periodic table is the shortest period of the periodic table. The sixth period of the periodic table is the longest period of the periodic table. Sixth period is the longest period in the periodic table with 32 elements. Among 32 elements 2 elements of s-block with electronic configuration $6s^1$ and $6s^2$ 6 elements of p-block with electronic configuration $6s^2,6p^1$ to $6s^2,6p^6$ elements 10 of d-block with electronic configuration $6s^2,5d^1$ to $6s^2,5d^{10}$ 14 elements of f-block with electronic configuration $6s^2,5d^1,4f^1$ to $6s^2,5d^1,4f^{14}$. In sixth period electrons starts filling 4f-orbital after 5d-orbital accommodate one electron.