How many electrons are in an atom of O2-.
chem - DrBob222, Sunday, September 5, 2010 at 6:30pm
I have a problem picturing and atom of O-2. I can picture an ion but not an atom.
chem - vanessa, Sunday, September 5, 2010 at 8:20pm
chem - DrBob222, Sunday, September 5, 2010 at 9:34pm
There are 8 electrons in an O atom so there must 16 electrons in two O atoms. It has a -2 charge; therefore, it must have two more electrons in excess.