Question
Chemistry Question on Group 17 Elements
Which one of the following elements can have both positive and negative oxidation state ?
A
F
B
I
C
Li
D
He
Answer
I
Explanation
Solution
He is a nobel gas with zero oxidation state. Li is a metal showing only +ve oxidation state of +1. F is the most electronegative element and shows only -1 oxidation sate. I shows both + ve and -ve oxidation states.