Gallium lies in Group 13 of the Period Table but a compound with empirical formula 'GaCl2' exists - how is this possible?
A) Group 13 elements form +3 compounds and +2 compounds.
B) The compound is exhibiting the inert pair effect forming Ga+ and Cl2- ions.
C) The compound is exhibiting the inert pair effect and contains both Ga(I) and Ga(III) ions i.e. Ga+[GaCl4]-.
D) It forms a structure similar to aluminium chloride and is made up of three centre, four electron bonds.
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