The elements of group - 2 are called alkaline earth metals because
They are alkaline in nature
They form alkaline salts and they are found in earth's crust
These are s− block elements
Their oxides are alkaline and occur in earth's crust
The elements of Group 2 are called alkaline earth metals because their oxides and hydroxides are alkaline in nature and these metal oxides are found in the earth’s crust.