Question

why Pr and Dy are having +4 oxidation state?

Answer 1

Answer:

Hey mate here is your answer..

Usually all Pr, Nd, Tb and Dy lanthanide tends to show stable oxidation state of +3. Now, if these lanthanide tends to form + 4 oxidation state that will be unstable. Thus, to stabilise the +4 oxidation state of these lanthanide a strong electronegative

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Explanation:

Answer 2

Hope the picture which I have attached will help u.