Provide the primary details of alkali and alkaline earth metals.

(N/A) The $s$-block elements of the Periodic Table are those in which the last electron enters the outermost $s$-orbital.
As the $s$-orbital can accommodate only two electrons,two groups ($1$ and $2$) belong to the $s$-block of the Periodic Table.
The general electronic configuration of $s$-block elements is [noble gas] $ns^{1}$ for alkali metals and [noble gas] $ns^{2}$ for alkaline earth metals.
Group-$1$ of the Periodic Table consists of the elements: lithium,sodium,potassium,rubidium,caesium,and francium. They are collectively known as the alkali metals. These are so called because they form hydroxides on reaction with water,which are strongly alkaline in nature.
The elements of Group-$2$ include beryllium,magnesium,calcium,strontium,barium,and radium. These elements,with the exception of beryllium,are commonly known as the alkaline earth metals. These are so called because their oxides and hydroxides are alkaline in nature and these metal oxides are found in the earth's crust.