Question

how many groups are there in periodic table​

Answer 1

Answer:

In the periodic table of the elements, each numbered column is a group. In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table, and the f-block columns (between groups 3 and 4) are not numbered.

Answer 2

In the modern periodic table there are 18 groups