Which of the following will always have a charge of -2 when present in a compound?
Fe
O
Cr
Na
2 answers
A work of caution here. The correct answer is none of those listed. I THINK
A work of caution here. The correct answer is none of those listed. I THINK the author of the problem expects the answer to be O but that is not right. It will be -2 in oxides. In peroxides it will be -1.
Fe is +2 or +3
O is -2 and -1
Cr is +2, +3, +6
Na is +1
Fe is +2 or +3
O is -2 and -1
Cr is +2, +3, +6
Na is +1
1 answer