Warren Ellis says: "Adam Mann is conducting experiments with the radioactive isotope Uranium-235, and is caught in a "weird chemical accident" giving him atomic powers. He uses these powers to covertly fight crime and Communism as Atomic Man. His powers include super strength, flight, and projecting energy blasts from his right hand. To control and neutralize his power, he wears a lead glove over his hand and takes it off when he wants to turn the powers on. "

That's all I'm giving you.