20 electrons
42 electrons
Two electrons from each element are shared; the total is four electrons.
A phosphorus atom has 15 electrons.
6 valence electrons
8 electrons
16 electrons
6 electrons
4 electrons.
97 electrons
20 electrons
Beryllium (Be) has 4 electrons.
There are 16 electrons in an O2 molecule. Each oxygen atom contributes 8 electrons, totaling 16 electrons in the molecule.
15 total electrons, 3 valence electrons
Nitrogen has 7 electrons.
Terbium has 65 electrons.
Roentgenium has 111 electrons.