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  1. Deuterium - Wikipedia

    Deuterium ... Deuterium (hydrogen-2, symbol 2H or D, also known as heavy hydrogen) is one of two stable isotopes of hydrogen; the other is protium, or hydrogen-1, 1 H. The deuterium …

  2. Deuterium | Definition, Symbol, Production, & Facts | Britannica

    Dec 26, 2025 · Deuterium, isotope of hydrogen with a nucleus consisting of one proton and one neutron, which is double the mass of the nucleus of ordinary hydrogen (one proton). It is a …

  3. What Is Deuterium? Facts and Uses - Science Notes and Projects

    Feb 9, 2021 · Deuterium is the hydrogen isotope that has one proton and one neutron in its atomic nucleus. In contrast, most hydrogen is the isotope called protium, which has one proton …

  4. What Is Deuterium? The Heavy Isotope of Hydrogen

    Jan 7, 2026 · Deuterium is a stable isotope of the element hydrogen, often called “heavy hydrogen.” Isotopes are variations of a chemical element that share the same number of …

  5. What is Deuterium? - International Atomic Energy Agency

    Jan 13, 2023 · Deuterium is a stable isotope of hydrogen, which, unlike “normal” hydrogen atoms, or protium, also contains a neutron.

  6. 36 Facts About Deuterium

    Mar 3, 2025 · Discover 36 fascinating facts about deuterium, the heavy hydrogen isotope, and its crucial role in science, energy, and the universe.

  7. Deuterium - Wikiwand

    Deuterium is subsequently produced by the slow stellar proton–proton chain, but rapidly destroyed by exothermic fusion reactions. The deuterium–deuterium reaction has the second …

  8. Deuterium Definition - Intro to Chemistry Key Term | Fiveable

    Deuterium, also known as heavy hydrogen, is a stable isotope of hydrogen with a nucleus containing one proton and one neutron, in contrast to the more common hydrogen isotope with …

  9. Deuterium: Definition, Properties, Uses & Key Facts Explained

    Deuterium, also known as heavy hydrogen, is one of the isotopes of hydrogens that is stable. The name deuterium is derived from the Greek word deuterons, which means 'second'.

  10. What Is Deuterium? - Deuterium Facts - ThoughtCo

    Apr 2, 2019 · What is deuterium? Here's a look at what deuterium is, where you might find it, and some of its uses.