Helium atom −54.41776311(2) eV. The total ground state energy of the helium atom is −79.005151042(40) eV, or −2.90338583(13) a.u. Helium atom A helium atom is an atom of the chemical element helium. Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with either one or two neutrons, depending on the isotope, held together by the strong force. Unlike for hydrogen, a closed-form solution to the Schrödinger equation for the helium atom has not been found. However, various approximations, such as the Hartree–Fock method, can be used to estimate the ground state energy and
Children of the Atom (supplement) Children of the Atom (supplement) Children of the Atom is a role-playing game supplement published by TSR in 1986 for the "Marvel Super Heroes" role-playing game. "Children of the Atom" is a supplement for the Advanced Set describing all of Marvel's mutant heroes and villains. "Children of the Atom" is an encyclopedia of mutant-kind, detailing their friends, enemies, homes and equipment. It includes a miniscenario, "Dreamchild." MA1 "Children of the Atom" was written by Kim Eastland and was published by TSR, Inc., in 1986 as a 96-page book with an outer folder. Pete Tamlyn reviewed "Children of the Atom" for