Answer: As per the historical periodicals’ classification, there seem to be 18 groups. The periodic table has 8 groups involved: 1st group, 2nd group, 13th group, 14th group, 15th group , 16th group, 17th group and 18th group. (previously numbered as 1]Ia, 2] IIa, 3]IIIa, 4]IVa, 5]Va, 6]VIa, 7]VIIa, and 0, respectively).
A horizontal panel of the periodic table is alluded to as a period. There have been seven periods in the periodic table, including one that commences on the extreme left. A communal is a continuous column of the periodic table that has been concentrated on the composition of the outermost shell electrons. An aggregate of 18 groups exist.