How Are We Going To Get To Fusion Without Doing Fission? Fusion which fusing two nucleus together. We can fuse all the elements in the periodic table up to the element Iron. After element iron fusion still possible but it will take a lot of energy more than it gives out. The easiest element to fuse is what comes first in the periodic table which is Hydrogen. Fusion will require more and more energy the further we move along the periodic table, so for example Helium fusion will require more energy than hydrogen and Lithium more than Helium because Helium has 2 protons compared to only 1 in Helium and Lithium has 3 protons compared to Helium. So we should begin fusing with the easiest element which is Hydrogen. Technology has bad and good sides. I should add all technology has bad sides and good sides. Uranium nuclear fission is a good technology too if used in a good way. Dropping uranium bomb over a city of 100K people is not a good use of this technology. We are all fearing ...