In addition to hydrogen, all elements in Group I of the periodic table have one valence electron. They are lithium, sodium, potassium, rubidium, cesium, and francium. The fa â¦ rther you move right on the periodic table the more valence electrons.For example, elements in Group VII have 8 valence electrons except helium.ll the elements in the first column of the periodic table (lithium, sodium, potassium, rubidium, cesium, and francium) have one valence electron. I also believe Helium has on â¦ e valence electron.