This element wasn't even named until roughly 200 trillion half-lives had passed after the birth and death of the original atom. This week's element is meitnerium, which has the atomic symbol, Mt, and ...

Iron (Fe, atomic number 26) is a redox-active transition metal element found in living systems as Fe2+ or Fe3+ ions. It is rarely found free in biology, but is bound to proteins such as ferritin or ...