Making the world better, one answer at a time. 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 farther you move right on the periodic table the more valence electrons.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.