Currently the Periodic Table lists 118 elements.

The group number is an identifier used to describe the column of the standard Periodic Table in which the element appears.

On a standard periodic table, Arsenic (As) is in Row 4, Column 15.

In chemistry, a group (also known as a family) is a vertical column in the periodic table of the chemical elements. There are 18 groups in the standard periodic table.

I know that there are over a hundred but you can't always say because when more elements are discovered they are put on the periodic table on the standard table there are 118,