What does it mean for a particle to be in two places at once and why should a chemist care? We will explore quantum mechanics and nuclear chemistry. We will examine wave-particle duality, wavefunctions, Heisenberg’s uncertainty principle, and Schrödinger’s famous cat. We will explore fission, fusion, radioactive decay, carbon dating, and the long shadow of the Manhattan Project. From Hiroshima to Chernobyl to today’s energy debates, nuclear science has never been just science.