Should civilians be off limits during war? what if another attacks your civilians

Civilians should be off limits during war considering that they are non-combatants. If another military attacks your civilians, you should not retaliate in the same manner as them, instead it is most appropriate to report them for war crimes to the International Criminal Court.

Aneutral atom must have the same number of neutrons and protons? no, they must have the same number of protons and electrons