How does manganese show its variable oxidation states? 

Which of the following element does not show the variable oxidation state ?

Which of the following element does not show the variable oxidation state ?

Which one of the following does not exhibit variable oxidation states?

Why do transition elements show variable oxidation state?

Why do alkali metals not show variable oxidation states ?

How many of the following show variable oxidation states in their compounds? Sc,Cr,Cu,Zn,Fe,Hg,La

Assertion (A): Barium is not required for normal biological function in human beings. Reason (R ): Barium does not show variable oxidation states.

Which transition element does not exhibit variable oxidation state?

Give reason: (i) Transition metals show variable oxidation states. (ii) Actinoids show wide range of oxidation states.

Among the following molecules, in which does bromine show the maximum oxidation state?