Transitions elements show generally positive oxidation state due to

Fluorine does not show positive oxidation state due to the -

Transition metals show variable oxidation states due to tendency of ‘d’ as well as ‘s’ electrons to take part In bond formation:- Which element in the first series of transition elements does not exhibit variable oxidation states and why?

Why do transition elements show variable oxidation states ? Name the element showing maximum number of oxidation states among the first series of transition metals from Sc (Z = 21) to Zn (Z= 30).

Why do transition elements show variable oxidation states? Write the name of a 3d-series element that exhibits maximum oxidation states.