heavy hydrogen

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heavy hydrogen

A scientist carefully handles a vial of heavy hydrogen in the laboratory.

Definition
  1. Noun:
    • An isotope of hydrogen: "Heavy hydrogen" is a stable isotope of hydrogen whose nucleus contains one proton and one neutron, giving it approximately twice the atomic mass of the most common hydrogen isotope. Its chemical symbol is D or ²H, and it is also called deuterium.
Usage
  • "Heavy hydrogen" is used primarily in scientific and technical contexts, particularly in chemistry, nuclear physics, and engineering.
  • It is a non-count noun. You refer to a quantity or sample of it (e.g., , ).
  • It is often used attributively to modify other nouns (e.g., , which contains heavy hydrogen).
Examples
  • Noun:
    • The reactor uses heavy hydrogen as a moderator.
    • Scientists can trace chemical pathways by substituting heavy hydrogen for ordinary hydrogen in molecules.
    • The difference in mass between hydrogen and heavy hydrogen affects reaction rates.
Advanced Usage
  • "Deuterium": This is the standard scientific name for heavy hydrogen. The terms are synonymous in technical writing.
    • Deuterium, or heavy hydrogen, is crucial for nuclear fusion research.
  • In compound form: It frequently appears in the term "heavy water" (D₂O), which is water where the hydrogen atoms are replaced by deuterium atoms.
    • Heavy water, containing heavy hydrogen, is used in some types of nuclear reactors.
Variants and Related Words
  • Deuterium (n): The systematic name for heavy hydrogen (²H).
  • Tritium (n): A radioactive isotope of hydrogen with two neutrons (³H). It is sometimes called "super-heavy hydrogen."
  • Protium (n): The most common isotope of hydrogen, with no neutrons (¹H). This term is used to distinguish it from heavy hydrogen.
  • Isotope (n): One of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons.
Synonyms
  • Deuterium: The direct and more precise synonym.
Related Phrases and Compounds
  • Heavy water: Water in which the hydrogen atoms are deuterium (heavy hydrogen) atoms.
    • The facility produces heavy water for industrial use.
  • Deuterated compound: A chemical compound in which one or more hydrogen atoms have been replaced by deuterium (heavy hydrogen) atoms.
    • The deuterated solvent was analyzed using NMR spectroscopy.
heavy hydrogen

A scientist carefully handles a vial of heavy hydrogen in the laboratory.

Noun
  1. an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)

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