Tellurium polyatomic anions

The group of the chalcogens sulfur, selenium and tellurium is a typical triad of the more electronegative nonmetals with relatively high-ionization energies, relatively strong element-element bonds and a clear tendency to form mono-and polyatomic anions (Table 1). 

Like their sulfur congener, selenium and tellurium can form polyatomic cations and anions in many compounds. 

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