because s orbital had hold maximum of two electrons
groups are the vertical columns on the periodic table
the vertical columns in the periodic table are known as groups.
7 periods and 18 groups are there on the modern periodic table.
periodic table is classified into groups and periods.There are 18 groups and 7 periods in periodic table.
The three families that are found in the center portion of the periodic table are the Iron group, the Cobalt group and the nickel group. There are 18 families in the periodic table.
There are 18 groups and 7 periods in the modern periodic table.
groups
There are a total of 18 groups on The Periodic Table of Elements.
There are 18 groups in the periodic table of elements.
group or family
There are 18 groups on the periodic table.
There are 18 groups in periodic table. They are also referred as families.