Why BeCl2 is covalent in nature? Due to small size and high charge density Be, its polarizing power is maximum, since Be+2 ion essentially pull the electrons cloud from Cl-, such that the electrons pair are effectively shared. According to Fajan’s rule more the polarisation, more will be the covalent character. Why is BeCl2 more covalent than LiCl?īeCl2 is more covalent than LiCl. It rather attracts a bonding pair of electrons towards itself only. This is mainly because beryllium is a small atom with high relative ionization energy (900 kJ/mol) and therefore does not form cations. Beryllium Chloride (BeCl2) is not ionic but rather a covalent compound.
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