Description:  Professor Ray Palmer, a.k.a. The Atom, was a snarky size-altering member of the Justice League, and one of many who joined after the Thanagarian invasion. Ray Palmer was an expert physicist at a prestigious Boston university. His scientific work into white dwarf star matter was known to Vandal Savage, who attempted to use it to build a superweapon. It was stopped by the Justice League.

The Atom possessed a belt that can shrink and grow his body to varying degrees, including the subatomic level. This ability is not restricted to him, as he is also capable of reducing the size of other people or objects he is in contact with. However, whilst he has shrunken himself, he retains all of his physical strength that he has at his normal size, making him seem surprisingly super strong.

After the Thanagarian invasion, the Atom joined the expanded Justice League. When Amazo returned to Earth, the Atom, using his expertise in nanotechnology, helped Lex Luthor build a nano-disassembler beam cannon that would stop the android. When Amazo proved resistant to even that, the Atom shrunk both himself and Luthor down to the subatomic level as a last resort.