Answer :
Final answer:
The Periodic Table of Elements is primarily composed of metals, which make up about three-fourths (or 75%) of all the elements.
This includes groups 1 to 12 on the table, containing both the transition metals and the alkali and alkaline earth metals.
Explanation:
The Periodic Table of Elements is predominately made up of metals.
In fact, metals account for about 75 percent, or three-fourths, of all the elements.
For example, groups 1 to 12 on the Periodic Table are all metals, excluding hydrogen.
These include both the transition metals (like iron and copper) and the alkali and alkaline earth metals (like sodium and magnesium).
Therefore, almost 3/4 of the elements on the Periodic Table are metals.
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