Question

The long form of periodic table consists of:

• A. Seven periods and eight groups
• B. Seven periods and eighteen groups
• C. Eight periods and eighteen groups
• D. Eighteen periods and eight groups

Answer 1

The correct option is B Seven periods and eighteen groups

There are seven (7) horizontal rows in this periodic table called periods. Thus, there are seven periods in this periodic table.

The modern periodic table of the elements contains 18 groups, or vertical columns.