The definition of hydrogen is a gaseous element that has no color or odor and is flammable.
Facts About Hydrogen
- An atom of hydrogen is the smallest of all elements that exist.
- Hydrogen is the most plentiful element in the universe.
- An atom of hydrogen is made up of two subatomic particles, one electron and one proton.
- Hydrogen exists in three forms - hydrogen, deuterium, and tritium.
- Tritium is radioactive and is used in the construction and operation of nuclear weapons.
- The combustion of hydrogen is very clean and has little impact on the environment. The byproduct of the combustion of hydrogen and oxygen is water vapor.
- Hydrogen gas was the first fuel used in inflatable aircrafts and Zeppelins, such as the Hindenburg which exploded in 1937.
- Hydrogen is a perfect liquid for cryogenic freezing.
An example of hydrogen is one of the elements in water.
The element hydrogen on the periodic table.
hydrogen definition by Webster's New World
Origin: French hydrogène (see hydro- and amp; -gen): coined (1787) by L. B. Guyton de Morveau (1737-1816), French chemist, in reference to the generation of water from the combustion of hydrogen
- hydrogenous adjective
hydrogen definition by American Heritage Dictionary
noun Symbol H
Origin: French hydrogène : Greek hudro-, hydro- + French -gène, -gen.
- hy·drogˈe·nous adjective
hydrogen - Cultural Definition
The lightest chemical element; its symbol is H. Hydrogen normally consists of a single electron in orbit around a nucleus made up of a single proton. It is usually found as a gas and has several uses as a fuel.
- Hydrogen atoms are combined to form helium atoms in fusion reactions in stars and in hydrogen bombs, which release huge amounts of energy. Hydrogen also burns rapidly, producing water as it combines with oxygen (see H2O and oxidation).
- For a time, hydrogen was frequently used to fill blimps and dirigibles because of its extremely low weight. In 1937, however, the hydrogen in the dirigible Hindenburg caught fire, and many of the passengers and crew were killed. Since that time, helium has been widely preferred to hydrogen for use in airships; it is not as buoyant (see buoyancy) or cheap as hydrogen, but, being an inert gas, it does not burn.
- Because there is so much hydrogen in stars, it is by far the most abundant element in the universe.
hydrogen - Medical Definition
noun Symbol H
hydrogen - Science Definition
Variant of hydrogen ion
- the positively charged nucleus of hydrogen, H, without its electron
- hydronium ion