The element with electronic configuration $1s^2, 2s^2 2p^6, 3s^2$ would be

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

$A$ chemistry student wants to identify the metal ion in a salt. They make a paste of the salt with concentrated $HCl$ on a clean platinum wire loop. If they take a small amount of this paste and place it in a non-luminous flame,it produces a green flame. Which metal is present?

What is the effect of adding gypsum to cement?

The solubilities of carbonates decrease down the magnesium group (Group $2$) due to a decrease in:

Among the sulphates of alkaline earth metals,the solubilities of $BeSO_4$ and $MgSO_4$ in water,respectively,are