`color{green}(★)` Except for beryllium halides, all other halides of alkaline earth metals are ionic in nature.
`color{green}(★)` Beryllium halides are essentially covalent and soluble in organic solvents.
`color{green}(★)` Beryllium chloride has a chain structure in the solid state as shown fig.
`color{green}(★)` In the vapour phase `color{red}(BeCl_2)` tends to form a chloro-bridged dimer which dissociates into the linear monomer at high temperatures of the order of `color{red}(1200 K)`.
`color{green}(★)` The tendency to form halide hydrates gradually decreases (for example, `color{red}(MgCl_2·8H_2O, CaCl_2·6H_2O, SrCl_2·6H_2O)` and `color{red}(BaCl_2·2H_2O)` ) down the group.
`color{green}(★)` The dehydration of hydrated chlorides, bromides and iodides of `color{red}(Ca, Sr)` and `color{red}(Ba)` can be achieved on heating; however, the corresponding hydrated halides of `color{red}(Be)` and `color{red}(Mg)` on heating suffer hydrolysis.
`color{green}(★)` The fluorides are relatively less soluble than the chlorides owing to their high lattice energies.
`color{green}(★)` Except for beryllium halides, all other halides of alkaline earth metals are ionic in nature.
`color{green}(★)` Beryllium halides are essentially covalent and soluble in organic solvents.
`color{green}(★)` Beryllium chloride has a chain structure in the solid state as shown fig.
`color{green}(★)` In the vapour phase `color{red}(BeCl_2)` tends to form a chloro-bridged dimer which dissociates into the linear monomer at high temperatures of the order of `color{red}(1200 K)`.
`color{green}(★)` The tendency to form halide hydrates gradually decreases (for example, `color{red}(MgCl_2·8H_2O, CaCl_2·6H_2O, SrCl_2·6H_2O)` and `color{red}(BaCl_2·2H_2O)` ) down the group.
`color{green}(★)` The dehydration of hydrated chlorides, bromides and iodides of `color{red}(Ca, Sr)` and `color{red}(Ba)` can be achieved on heating; however, the corresponding hydrated halides of `color{red}(Be)` and `color{red}(Mg)` on heating suffer hydrolysis.
`color{green}(★)` The fluorides are relatively less soluble than the chlorides owing to their high lattice energies.