[nightowl1]

Hello,
Br 's oxidation states = -1, +5, +7   correct?

and

the number of unpaired electrons on Pr is 3 right?
because 5d1 had 1 unpaired e? pluse the 4f2 has 2 unpaired e?

and finally, (the toughest one)
The expected oxidation states of Nd is 2, 3, and 6?


I hope this is right
please check and thank you