There are a total of 118 elements, 7 periods and 18 groups arranged in the periodic table.
Group-1 elements are Alkali metals, Group-2 elements are Alkaline earth metals, Group-11 elements are coin metals, Group-16 elements are called Chalcogen, Group-17 elements are Halogen and elements belonging to group-18 are called inert gas.
15 elements with atomic numbers 57-71 are called the Lanthanide elements. Fifteen elements with atomic numbers 89-103 are categorized as Actinide elements
