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Q.
Of the metals $Be$, $Mg$, $Ca$ and $Sr$ of group $2$ in the periodic table, the least ionic chloride will be formed by
Classification of Elements and Periodicity in Properties
Solution:
Beryllium halides are covalent in nature. This is due to the small size and high charge density of $Be ^{2+}$ ion i.e., it has high polarising power. However, the halides of the other alkaline earth metals (fluorides, chlorides, bromides, and iodides) are ionic solids.