Bromine, an element long considered inessential for animal life and even dangerous, has now joined the ranks of 27 other elements deemed necessary for human development. Its importance lies in its ...

The chemical symbol for oxygen is O. Makes sense. Calcium gets repped by a Ca. Sounds good. Hydrogen? H. Cobalt? Co. Lithium? Li. With you so far. Lead? Pb. There are actually a few things that ...