4 (including man-made metals)
There are 18 main groups in the modern periodic table of elements.
18
There are 18 groups in the periodic table of elements.
It groups together elements with similar properties.
The periodic table has 7 periods and 18 groups. The order of elements is governed by the number of protons.
There are 18 main groups in the modern periodic table of elements.
There are 18 groups and 7 periods in the modern periodic table.
7 periods and 18 groups are there on the modern periodic table.
by groups and periods
Both arrange elements in groups of elements having similar properties.
Both arrange elements in groups of elements having similar properties.
groups
18
There are 18 groups in the periodic table of elements.
It groups together elements with similar properties.
Groups in the periodic table are the vertical columns in which the elements are arranged.
There are 18 groups in the Periodic Table of elements.