The group number tells you the number of valence electrons in the outer shell. This is important because it is the valence electrons that participate in bonding, and thus in determining the properties of the element.
There are 18 main groups in the modern periodic table of elements.
18
The Periodic Table has 18 groups and 7 periods.
groups are the vertical columns on the periodic table
The periodic table has 7 periods and 18 groups. The order of elements is governed by the number of protons.
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.
There are 18 main groups in the modern periodic table of elements.
7 periods and 18 groups are there on the modern periodic table.
18
There are 18 groups and 7 periods in the modern periodic table.
18
The Periodic Table has 18 groups and 7 periods.
9
Both arrange elements in groups of elements having similar properties.
Both arrange elements in groups of elements having similar properties.
groups are the vertical columns on the periodic table