Question

Mendeleev periodic table vertical column group number

Answer 1

Groups or vertical column are same things in periodic table as 18 in no. but oppt. of this, rows or periods (horizontal) are there in the periodic table which are 7in number. There are 18 groups (columns) in the periodic table. Group 1 (alkali metals) is the column on the far left of the table.

Answer 2

Answer:

There are eight (8) groups in Mendeleev's periodic table.