Question

The number of periods present in the Modern Periodic Table is

Answer 1

Periodic Table

• The periodic table involves $18$ vertical columns and $7$ horizontal rows.
• The horizontal rows are referred to as periods.
• The vertical columns are referred to as groups.

Examples

• Boron, Carbon, and nitrogen are present in the same period that is period number $2$.
• Sodium, Potassium, and Lithium are present in the same group that group number $1$.

Hence, the number of periods present in the Modern Periodic Table is $7$.