There are 18 columns.
there are 18 columns
18
18
There are 18 A columns on the periodic table, also known as the groups. These columns represent elements with similar chemical properties and are numbered from 1 to 18.
Columns in the periodic table are called "groups" and there are 18 groups in the periodic table.
There are 18 columns on the periodic table.They are called groups or families.
There are 18 groups in the periodic table of elements.
groups are the vertical columns on the periodic table
The periodic table has 7 rows and 32 columns.
groups
The vertical columns of the periodic table are called groups or families.
The columns on the periodic table are called Groups.