Using only the periodic table arrange the following elements in order of increasing ionization energy gallium, potassium, selenium, germanium Lowest Highest Please answer this question according to the general rules you have learned regarding periodic trends. DO NOT base your answer on tabulated values since exceptions may occur. Using only the periodic table arrange the following elements in order of increasing ionization energy: hydrogen, lithium, cesium, rubidium . Lowest Highest Please answer this question according to the general rules you have learned regarding periodic trends. DO NOT base your answer on tabulated values since exceptions may occur