This is a chemical element. You can find the how many electron in a single atom by using a Periodic Table.
2 pairs
O=O
-AK
2
10
The electrons configuration for O2- is [He]2s22p6.
4 electrons, 2 valence electrons
100 electrons
Electrons are always negative. There is no neutral electrons.
8 electrons and 8 protons.
10
The electrons configuration for O2- is [He]2s22p6.
8 electrons
4 electrons, 2 valence electrons
16 electrons
6 electrons
100 electrons
4 electrons.
97 electrons
20 electrons
15 total electrons, 3 valence electrons