Hacker News new | ask | show | jobs
by FiatLuxDave 2149 days ago
The term you are looking for is "nuclear binding energy curve". Basically lighter isotopes can gain energy by fusing, and heavier isotopes can gain energy by splitting, but somewhere in the middle (around iron and nickle) the isotopes are the most stable. So you gain energy by moving towards iron, whether from the light end or the heavy end of the periodic table.