10
The electrons configuration for O2- is [He]2s22p6.
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
4 electrons, 2 valence electrons
100 electrons
8 electrons and 8 protons.
10
The electrons configuration for O2- is [He]2s22p6.
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
8 electrons
4 electrons, 2 valence electrons
16 electrons
6 electrons
4 electrons.
97 electrons
20 electrons
100 electrons