Which element forms maximum compound in chemistry ?

Which forms maximum compounds with xenon ?

Which element forms a compound with the formula H_(3)XO_(4) ?

The element which forms maximum number of compound is

Which element forms maximum number of types of oxidation states?

Which element forms the highest number of compounds in the periodic table ?

Transition elements form binary compounds with halogens. Which of the following elements will form MF_(3) type compounds?