The number of valence electrons is unique to each group. For example, group 1 has 1 valence electron, and group 3 has 3 valence electrons, and group 7 has 7 valence electrons. This is unique for each group as no other group has that same number of valence electrons.
groups are the vertical columns on the periodic table
Groups share same valence electron. Their chemical property is also same.
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.
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.