Vertical columns are named 'GROUPS.
Horizontal lines are named 'PERIODS'.
Each Group has a number, and sometimes a name
Hence Group (I) ( The Alkali metals)
Group (I) , contains the metallic elements ;- Lithium , Sodium, Potassium, Rubidium, Caesium, and Francium.
Group (II) are the Alkaline Earth Metals
Group (VII) are the Halogens
Group(VIII) are the Noble/Inert Gases.
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.
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
The transition metals are located in groups 3 - 12 on the Periodic Table.
There are 18 groups on the periodic table.
There are 18 groups in periodic table. They are also referred as families.