The three naturally occurring isotopes of hydrogen. The fact that each nuclide has 1 proton makes them all isotopes of hydrogen: the identity of the isotope is given by the number of protons and neutrons. …

5 days ago · Hydrogen-1 Stable, most common hydrogen isotope found in water and organic matter; nonradioactive. Widely used in chemistry, industry, and as a reference for atomic mass. No decay; …

Oct 7, 2025 · Isotopes are atoms of the same element that differ in the amount of neutrons and atomic mass. Almost all elements on the periodic table have at least two different natural isotopes. Many …

Dec 12, 2025 · An isotope is one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with …

It has three naturally occurring isotopes-- 1 H, 2 H, and 3 H. Hydrogen-1, or protium, is the most prevalent hydrogen isotope, accounting for 99.98% hydrogen atoms, and has no neutrons.

DOE Explains...Isotopes Hydrogen and its two naturally occurring isotopes, deuterium and tritium. All three have the same number of protons (labeled p+) but different numbers of neutrons (labeled n).

Learn what isotopes are, how they differ by neutrons, and how to write isotope notation in this clear, student-friendly chemistry lesson.

An isotope is named after the element and the mass number of its atoms. For example, carbon-12 is an isotope of carbon with a mass number of 12. All three isotopes of hydrogen have identical