Question

What do you mean by groups and periods in the peridic table

Answer 1

Explanation:

Groups and periods are two ways of categorizing elements in the periodic table. Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period

Answer 2

Periods are horizontal rows across the periodic table. Their are 7 periods in periodic table.

Groups are vertical columns down the table. Their are 18 groups in periodic table.