hydrogen atom

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hydrogen atom

A hydrogen atom consists of one proton and one electron.

Definition
  1. Noun:
    • The smallest particle of the element hydrogen that retains the chemical properties of hydrogen: A hydrogen atom consists of one proton and one electron. It is the simplest and most abundant atom in the universe.
Usage
  • The term "hydrogen atom" is used in scientific contexts, particularly in chemistry and physics, to refer to the fundamental unit of the element hydrogen.
  • It is a countable noun. You can have one hydrogen atom or many hydrogen atoms.
Examples
  • Noun:
    • The bond forms between a hydrogen atom and an oxygen atom.
    • In its ground state, a hydrogen atom has one electron in the lowest energy level.
    • Scientists studied the spectrum emitted by an excited hydrogen atom.
Advanced Usage
  • "Isolated hydrogen atom": Refers to a single hydrogen atom that is not bonded to any other atom, often discussed in theoretical physics.
    • The model calculates the energy levels of an isolated hydrogen atom.
  • "Hydrogen atom abstraction": A chemical reaction where a hydrogen atom is removed from a molecule.
    • The radical initiates the reaction through hydrogen atom abstraction.
Variants and Related Words
  • Atomic hydrogen: Often used synonymously to refer to hydrogen in its monatomic, unbound form (H), as opposed to molecular hydrogen (H₂).
  • Proton: While not a synonym, the nucleus of a common hydrogen atom is a single proton.
  • Deuterium atom: A variant (isotope) of a hydrogen atom whose nucleus contains one proton and one neutron.
  • Tritium atom: A radioactive variant (isotope) of a hydrogen atom whose nucleus contains one proton and two neutrons.
Synonyms
  • H atom: A common scientific abbreviation.
  • Protium atom: A specific term for the most common isotope of hydrogen (one proton, no neutrons). While technically precise, "hydrogen atom" is more commonly used.
Related Phrases
  • "Hydrogen atom transfer": A key step in many chemical and biological reactions where a hydrogen atom (H•) is moved from one molecule to another.
    • The enzyme catalyzes a hydrogen atom transfer.
  • "Rydberg hydrogen atom": A hydrogen atom where the electron is in a very high-energy state (a Rydberg state).
    • Rydberg hydrogen atoms exhibit exaggerated quantum properties.
hydrogen atom

A hydrogen atom consists of one proton and one electron.

Noun
  1. an atom of hydrogen