What structural features do protium refer to in an atom?

Protium, the most common isotope of hydrogen, consists of one proton and one electron, and it has no neutrons. Its structural features include a single positive charge from the proton at the nucleus, surrounded by a negatively charged electron in a cloud-like distribution. Protium's simplicity makes it a fundamental unit in atomic theory, representing the basic structure of atoms with a minimal number of subatomic particles.