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
Atom Bank Atom Bank Atom Bank is a digital financial company and challenger bank. It provides banking services through a smartphone app. It has no physical outposts. As a smartphone app-based bank, it does not have a traditional online banking outlet, as users must use the application to bank. Atom first secured its banking license in June 2015. The company publicly launched in April 2016. In March 2017 it raised £83 million in venture funding, which brought its total funding to over £200 million. On 9 March 2017, the bank experienced over 5,000 new customer signups in one day, a new record.