Periodic groupings of the elements

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There are two principal ways to classify the elements of the periodic table. The first is a classification by groups or families. This is further subdivided into columns, which correspond to more particular families. The other is a classification by rows or periods.

The first block has two groups or families. first Group IA is also called the Alkali metals. Group IIA is called the Alkaline earth metals.

The second block has six groups or families. Group IIIA doesn't have a name except the Boron famiily. Group IVA is called the Carbon family. Group VA is called the Nitrogen family. Group VIA is sometimes called the Oxygen family or the chalcogens. Group VIIA is called the halogens. Group VIIIA is called the noble gases.

The third block, called the transition metals, has ten columns and eight groups. !B-VIIIB

The fourth block, called the inner transition metals, has fourteen columns.

The periodic table is organized into rows, which are called periods. Known elements can be placed into seven periods, with room for addition of more should they be discovered or created.