Why does google define a free radical as "an uncharged molecule (typically highly reactive and short-lived) having an unpaired valency electron"
I always associated free radicals with charges :S
An atom or molecule (can be ions) with unpaired electrons is a free radical - in HSC, it's usually one of the atoms doesn't have a full valence shell (typically an octet).
I'm more concerned about whether a free radical CAN have zero charge (it was in a physics questions; had I known free radicals could have zero charge than I would have gotten the answer). I can't even come up with a free-radical of zero charge without making it absolutely ridiculous. :S