Which property of the alkaline earth metals increases with their atomic number?

The most basic among these hydroxides is:

Among the following,the basic oxide is .....

Alkaline earth metals belong to the

State True or False:
$(1)$ $90 \ g \ Na$ and $170 \ g \ K$ are present in a person with $70 \ kg$ of body weight.
$(2)$ Ionization enthalpy of alkaline earth metals increases on moving top to bottom.
$(3)$ In vapour phase,$BeCl_2$ possesses a polymer-like arrangement.
$(4)$ $CaCO_3$ is used in the preparation of mortar.

Fill in the blanks:
$(1)$ Calcium and beryllium have flame colors of ...... and ....... respectively.
$(2)$ Quantitative analysis of calcium is carried out by ........
$(3)$ Beryllium powder on combustion burns brightly in air and gives ...... and .......
$(4)$ Beryllium hydroxide on dissolving in alkali gives .......