Question

What are groups and periods in the periodic table?

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 is group number $1$.