There are 18 vertical columns of elements in the periodic
table. Each column is called a group
of elements, or a family
of elements. Elements in the same family or group tend to have similar properties.
There are two formats in labelling the groups on the periodic
table. In some books (and on the Internet) you will find the "1-18"
numbering sequence. In other books, you will find the more popular "1-8
A and B" group labelling system. In this course, we will use the
latter system of labelling.
Learn the names and read about the elements belonging to
Group IA, Group IIA, Group VIIA and Group VIIIA.