Tellurium

Tellurium does not react with dilute non-oxidizing acids, under normal conditions.

Tellurium burns in air, forming tellurium(IV) oxide, TeO₂.

Te(s) + O₂(g) TeO₂(s)

Tellurium does not react with dilute bases under normal conditions.

Tellurium reacts with fluorine, F₂, forming tellurium(VI) fluoride.

Te₈(s) + 24 F₂(g) 8 TeF₆(l) [orange]

If the reaction takes place in a nitrogen atmosphere, at 0 °C, tellurium(IV) fluoride is formed instead:

Te₈(s) + 16 F₂(g) 8 TeF₄(s)


In a nitrogen atmosphere, at 0 °C, tellurium reacts with chlorine, Cl₂, bromine, Br₂, and iodine, I₂, forming the corresponding tellurium(IV) halides:

Te₈(s) + 16 Cl₂(g) 8 TeCl₄(s)
Te₈(s) + 16 Br₂(g) 8 TeBr₄(s)
Te₈(s) + 16 I₂(g) 8 TeI₄(s)

Cd reacts rigorously with Te forming CdTe [5].

Cd(s) + Te(s) CdTe(s)

Tellurium does not react with water under normal conditions.