3 more than it already has
8 valence electrons
7
Phosphorus need 3 electrons to complete its octet.
2
Because they have the same number of valence electrons and need the same number of electrons to fill their valence shells
8 valence electrons
antimony has 5 valence electrons
Cs3P. Cesium has one valence electron and Phosphorus has 5. Each of these elements wants to get to a perfect set of 8 valence electrons.5 plus 3 is eight, so you will need 3 Cesium and 1 phosphorus.
In a reaction u need two valence electrons to gain or share two valence electrons.
it needs six more electrons to have a full outer valence shell.
7
11 electrons makes the third energy level complete. One
Nitrogen has five valence electrons as a neutral atom, but it is shooting for eight. So it needs to gain three more electrons.
Phosphorus need 3 electrons to complete its octet.
1 more
helium has 2 valence electrons (in s orbital) and has complete s orbital. So it does not need to gain or lose more electrons to be stable.
14