18
7 periods and 18 groups are there on the modern periodic table.
There are 18 groups in the modern periodic table. The groups are also referred as families.
7 periods and 18 groups are there on the modern periodic table.
9
There are 18 groups and 7 periods in the modern periodic table.
The Periodic Table has 18 groups and 7 periods.
There are a total of 18 groups on The Periodic Table of Elements.
There are 18 groups in the periodic table of elements.
4 (including man-made metals)
There are 18 groups on the periodic table.
The modern periodic table has seven periods.
In the periodic table of the elements there are 7 periods and 18 groups. The rows are called periods and columns are called groups. You may be getting confused by the lanthanides and actinides. These groups of elements are found in two rows at the bottom and seem to not be a part of the table. However, if you find and extended version of the table you will see that, technically, these two rows belong in Periods 6 and 7.