Asked by vanessa

How many electrons are in an atom of O2-.
Answered by DrBob222
I have a problem picturing and <b>atom</b> of O<sup>-2</sup>. I can picture an ion but not an atom.
Answered by vanessa
yes ion.
Answered by DrBob222
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.