4H (atomic mass 4.026 43(11) Da), with one proton and three neutrons, is a highly unstable isotope.

protium, isotope of hydrogen (q.v.) with atomic weight of approximately 1; its nucleus consists of only one proton. Ordinary hydrogen is made up almost entirely of protium.

Deuterium and tritium are about double and triple the mass of protium and show significant physical and chemical differences particularly with regard to those properties related to mass, …

Protium is the most common and simplest isotope of the element hydrogen. An atom of protium consists of a single proton in its nucleus and a single electron orbiting it, with no neutrons.

Protium is the isotope of hydrogen containing only one electron and one proton. Learn more about its structure, atomic and physical properties of protium and uses.

What is Protium? ‘The basic hydrogen atom – a single proton circled by a single electron is also called protium’. An isotope of an element is an atom that has the same number of protons but …

Hydrogen-1 is the isotope of the chemical element hydrogen with mass number 1, also known under the names protium and light hydrogen. The atomic nucleus of the nuclide consists of a …

Feb 17, 2023 · Protium (1H) is the most abundant and the simplest isotope of hydrogen. It consists of one proton and one electron, and it has an atomic mass of approximately 1 atomic …

The meaning of PROTIUM is the ordinary light hydrogen isotope of atomic mass 1.

Dec 14, 2025 · Noun protium (plural protiums) (physics) The lightest and most common isotope of hydrogen, having a single proton and no neutrons: 1 1 H. It is the only stable nuclide with no …