Bonds polonium oxides

Tellurium occurs in the same periodic classification as sulfur, selenium, and polonium, Tellurium, unlike sulfiu and selenium, has only two allotiopic forms. Due to its 5,r25p4 electron configuration, tellurium, like sulfur and selenium, forms many divalent compounds with covalent bonds and two lone pairs, and d-hybndization is quite common, lo form compounds with tellurium oxidation states of +4 and —6,... 

The chemistry of polonium was recently reviewed by Bagnall (23). Regarding free radicals this review cites a calculation of the bond length of PoH (245) and some electrochemical evidence of Po(III) as an intermediate in the oxidation of Po(II) to Po(IV) in aqueous hydrochloric acid (24). 

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