Hydrogen atom (non relativistic) hydrogen atom was solved for the first time within Feynman's path integral formulation of quantum mechanics. This work greatly extended the range of applicability of Feynman's method. Hydrogen atom A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force. Atomic hydrogen constitutes about 75% of the baryonic mass of the universe. In everyday life on Earth, isolated hydrogen atoms (called "atomic hydrogen") are extremely rare. Instead, hydrogen tends to combine with other atoms
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.