Remember your BACK button to return here after reading about the hard and easy ways of balancing redox reactions . In a lesser offense, that prior webpage called NO by its ancient name, nitric oxide , which is known today as nitrogen monoxide .
Some atoms are really boring in their oxidation numbers.
So Group VIII element oxidation states come only as zero . No, because while it can be oxidized, it can only be oxidized by something that wants its electrons even more than it does. So Cl - isn't a good reducing agent. Something that didn't like to hang onto electrons. A metal would be a good candidate, and an alkali metal would be best of all.