there are 18 columns
There are 18 columns.
To make a data table you must make a chart with how ever many columns you are going to need and then fill out your information.
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.
18
18
There is no answer to that as you can have as little or many as you want.
There is no answer to that as you can have as little or many as you want.
4 4
Three
There are 18 columns on the periodic table.They are called groups or families.
18