Question

oxidation states of scandium are____
(a)+1,+2
(b)+1,+3
(c)+2,+3
(d)+3,+4

Answer 1

I think b should be the answer

Answer 2

+2 , +3...

because 3d^1 shell is near than 4s^2 shell From the Orbital...

So the electron of 4s^2 is 1st removed than 3d^1...

so this que ans is +2,+3..

i hope u understand...

all the best..