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hydrogen

UK/ˈhaɪdɹəd͡ʒ(ə)n/US/ˈhaɪdɹəd͡ʒ(ə)n/
nounC1Common in everyday speech and writing · #5,099 of 15,258leans written

Other forms: hydrogens

Hydrogen is the lightest element and the commonest in the universe. Hydrogen atoms, a hydrogen bond, hydrogen fuel.

It is element number one, a single proton with a single electron, and about three quarters of the ordinary matter in the universe is made of it. Stars burn it into helium. Hydrogen bonds hold water together and hold DNA in shape. As a fuel it burns to water and nothing else, which is the whole argument for it, and storing it is the whole difficulty. Note hydrogen peroxide, and the hydrogen bomb.

Definitions of hydrogen

  1. 1nounhydrogenThe lightest element, and the commonest in the universe.C1

    “About three quarters of ordinary matter is hydrogen.”

hydrogen is a chemical element.

Where it comes from

French hydrogène was coined by Lavoisier from Greek hydor, water, plus genes, forming — the water-maker, because burning it produces water. Oxygen was named the acid-maker by the same chemist, and that one turned out to be wrong.

  1. French

    hydrogène

  2. English, today

    hydrogen

Borrowed from French hydrogène. Borrowed from French hydrogène (“hydrogen”), by the French chemists Louis-Bernard Guyton de Morveau (1737–1816) and Antoine Lavoisier (1743–1794) from hydro- + -gène, from the fact that water is produced as a compound when hydrogen is oxidized.

Etymology from Wiktionary, CC BY-SA

Practised in Chemistry & Elements

Practise this word

hydrogen in the wild

  • 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, 1H.

    Deuterium

  • Understanding the colors of light absorbed and emitted by hydrogen was a crucial part of the development of quantum mechanics.

    Hydrogen

  • Emerging uses for hydrogen include the use of fuel cells to generate electricity.

    Hydrogen

  • A hydrogen atom is an atom of the chemical element hydrogen.

    Hydrogen atom

  • In everyday life on Earth, isolated hydrogen atoms (called "atomic hydrogen") are extremely rare.

    Hydrogen atom

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From Wikipedia, CC BY-SA 4.0. These sentences were written by other people about their own subjects; they are here to show the word at work, not as anybody’s opinion.