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hydrogen

hydrogen

227 3.1
A very light, colorless gas that burns easily and makes up much of the universe
  • noun
  • /ˈhaɪdrədʒən/
  • Specialized
translation icon : hidrógeno
  • Two part hydrogen, one part oxygen, you'll get water every time.
  • hydrogen atom
  • hydrogen gas
  • hydrogen fuel

What we did is to have more hydrogen and less oxygen.

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Examples

  • We take on the water, electrolyze it, and use the hydrogen to run the fuel cells.

    Fiction book (1999)
  • Similarly, homeowners might produce hydrogen from rooftop solar cells and store it in the basement.

    Academic text (1999)
  • I fully support hydrogen cars.

  • What we did is to have more hydrogen and less oxygen.

  • How could you forget the hydrogen tank?

  • Like this is a hydrogen powered train.

  • Even have new hydrogen powered ships now.

  • What was the temperature at which hydrogen recombined?

  • At the other end, you have hydrogen, the lightest element.

  • The chemical symbol for hydrogen is H, and it is known for being a colorless and odorless gas.

Synonyms

H
vshydrogen
  • Specialized
5 1.5

The symbol for hydrogen, the lightest gas

is the full word form used instead of a single-letter symbol

Compounds

hydrogen bomb
  • Specialized
8 4.9

A very powerful nuclear bomb that makes a huge explosion by joining hydrogen atoms

hydrogen sulfide
  • Specialized
4 5.1

A poisonous colorless gas with a strong rotten egg smell

hydrogen peroxide
  • Specialized
4 3.7

A clear liquid used to clean wounds, to bleach things, and to power rockets in strong form

hydrogen atom
  • Specialized
3 3.2

A very simple atom that has one proton and one electron

hydrogen bond
  • Specialized
1 4.1

A weak pull between a hydrogen atom in one molecule and oxygen or nitrogen in another

hydrogen cyanide
  • Specialized
1 7.5

A very poisonous liquid or gas that smells of bitter almonds and can kill if breathed in

heavy hydrogen
  • Specialized
1 7.0

A hydrogen atom with one neutron in its centre

hydrogen fluoride
  • Specialized
1 7.6

A colorless poisonous corrosive liquid used in industry that forms hydrofluoric acid in water

hydrogen sulfide
  • Specialized
1 4.4

A gas made in living cells that helps send signals in the body

acid hydrogen
  • Specialized
7.0

A hydrogen atom in an acid that can leave as a positive proton

acidic hydrogen
  • Specialized
6.8

A hydrogen atom that can leave an acid as a positive ion

hydrogen azide
  • Specialized
9.9

A colorless poisonous liquid with a bad smell that can explode

hydrogen bromide
  • Specialized
5.8

A colorless gas with a sharp smell that makes a strong acid when mixed with water

hydrogen carbonate
  • Specialized
4.2

A common chemical salt like baking soda that makes carbon dioxide with acid

hydrogen chloride
  • Specialized
4.9

A colorless gas that makes a strong acid with water and can burn skin

hydrogen electrode
  • Specialized
6.8

An electrode that has hydrogen on platinum and acts as a reference to measure voltage

hydrogen iodide
  • Specialized
6.3

A colorless strong-smelling gas that makes a strong acid when mixed with water

hydrogen ion
  • Specialized
4.9

A tiny particle with a positive charge that is one proton from a hydrogen atom

5.7

The amount of hydrogen ions in a liquid that shows how acidic it is

hydrogen sulfate
  • Specialized
5.5

A small negative particle that forms when sulfuric acid loses one hydrogen

A white salt used in baking and to reduce stomach acid

5.1

A white powder used in baking to make cakes rise and keep egg whites stable

3.2

A white powder used in baking to make dough rise and to stop heartburn

How Energy-Dense

hydrogen
  • Specialized
227 3.1
gasoline
  • US
318 1.6
fuel
1.0
to coal
  • Archaic
1 8.1
wood
613 1.0

Surface Forms

hydrogen singular
hydrogens plural

Morphology

hydrogen = hydro + gen

Hydrogen is a real Greek-based scientific coinage meaning roughly 'water-former', but that historical motivation is not recoverable for an average learner from the modern form alone.

Etymology

Hydrogen comes from the Greek parts hydro- 'water' and -gen 'maker', and it shares the same root as generate. So think of hydrogen as a 'water maker' because when hydrogen burns with oxygen it makes water, which is why the element has that name.