An atom consisting of a proton and an electron
An atom with one proton in the nucleus and one electron Kerr black hole - A rotating black hole Mass - How much matter there is in a body
an electron and a proton
a simple structure, composed of two distinct atomic particles
A hydrogen atom is an atom of the chemical element hydrogen. It is composed of a single negatively-charged electron circling a single positively-charged nucleus of the hydrogen atom. The nucleus of hydrogen consists of only a single proton (in the case of hydrogen-1 or protium; see box at right), or it may also include one or more neutrons (giving deuterium, tritium, and other isotopes).