It's an insidious little, I mean, heavy metal. Cadmium sits right below zinc on the periodic table and therefore shares many of its same chemical properties. In the environment it is distributed ...

Helium cadmium (HeCd) lasers are members of the same laser family as helium neon (HeNe) lasers, and they are the only relatively economical, continuous-wave sources for violet (442 nm) and ultraviolet ...