Phosphorous is element 15 and Radium is element 88 on the periodic table. Phosphorous is in the nitrogen group of elements, does not naturally exist as a free element on Earth, and radiates a luminescence quality. Radium is an alkaline Earth metal, is intensely radioactive, and is found in minute quantities in Uranium metals.
Doctor Alex Sartorius is exposed to tiny particles of radioactive sand from a cracked reactor core, transforming him into an irradiated supervillain bent on revenge. Professor Henry Ross was a scientist seeking to revive life using a Radium ray and serum, finding himself exposed to this dangerous science that made him a glowing green goon seeking a cure.
As Doctor Phosphorous the former Mister Sartorius went on a rampage in Earth-One's Gotham City, defeated by Batman at near-terrible cost to the caped crusader as he was exposed to excessive radiation from his foe. As Professor Radium, Ross stole to find a cure, although he learned this was temporary when he accidentally killed his girlfriend which turned him insane. Radium also faced the Batman, this one of Earth-Two, and perished when he plunged into a river... while his dangerous doppleganger returned and nearly eradicated with his deadly touch when encounteringEarth-Two's Hawkman during the Crisis on Infinite Earths.