Hydrogen
['haɪdrədʒ(ə)n] or ['haɪdrədʒən]
Definition
(noun.) a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe.
Typed by Gus--From WordNet
Definition
(n.) A gaseous element, colorless, tasteless, and odorless, the lightest known substance, being fourteen and a half times lighter than air (hence its use in filling balloons), and over eleven thousand times lighter than water. It is very abundant, being an ingredient of water and of many other substances, especially those of animal or vegetable origin. It may by produced in many ways, but is chiefly obtained by the action of acids (as sulphuric) on metals, as zinc, iron, etc. It is very inflammable, and is an ingredient of coal gas and water gas. It is standard of chemical equivalents or combining weights, and also of valence, being the typical monad. Symbol H. Atomic weight 1.
Edited by Alexander
Synonyms and Synonymous
n. (Chem.) Inflammable air.
Inputed by Heinrich
Definition
n. a gas which in combination with oxygen produces water an elementary gaseous substance the lightest of all known substances and very inflammable.—adjs. Hy′dric containing hydrogen; Hydrog′enous containing hydrogen: produced by the action of water as applied to rocks in opposition to those that are pyrogenous formed by the action of fire.
Typist: Osborn
Examples
- A siren worked by explosion of small quantities of oxygen and hydrogen mixed. Frank Lewis Dyer. Edison, His Life and Inventions.
- The atom, to be sure, can no longer be consider ed the smallest unit of matter, as the mass of a β particle is approximately one seventeen-hundredths that of an atom of hydrogen. Walter Libby. An Introduction to the History of Science.
- The next process is the purification of the gas from carbonic acid and sulphuretted hydrogen. Frederick C. Bakewell. Great Facts.
- Often he jeopardized his life, and once nearly lost it, by breathing carburetted hydrogen. Rupert S. Holland. Historic Inventions.
- In January of 1884, Wroblewski confirmed the liquefaction of hydrogen, which had been imperfectly accomplished by Cailletet before. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
- According t o Avogadro the water vapor contains twice as many atoms of hydrogen as of oxygen. Walter Libby. An Introduction to the History of Science.
- The hydrogen formed by the chemical action of the dilute sulphuric acid on the zinc moves toward the copper electrode, as in the simple voltaic cell. Bertha M. Clark. General Science.
- Examination of the cell shows that the copper plate is covered with hydrogen bubbles. Bertha M. Clark. General Science.
- The same effect is caused by the combustion of the carburretted hydrogen gas, and in a more perfect manner. Frederick C. Bakewell. Great Facts.
- Two atoms of the element hydrogen unite with one atom of the element oxygen to make one molecule of water. Bertha M. Clark. General Science.
- An important fact about hydrogen is that in burning it gives as much heat as five times its weight of coal. Bertha M. Clark. General Science.
- He took up the question, experimented with fire-damp, and found that it was in reality light carburetted hydrogen. Rupert S. Holland. Historic Inventions.
- It is called olefiant gas, and contains equal measures of hydrogen gas and carbon vapour; its specific gravity is 0. Frederick C. Bakewell. Great Facts.
- If fine platinum wire is placed in an ordinary gas flame, it does not melt, but if placed in a flame of burning hydrogen, it melts very quickly. Bertha M. Clark. General Science.
- He concluded that anything which could be created indefinitely by a process of friction could not be a substance, such as sulphur or hydrogen, but must be a mode of motion. Walter Libby. An Introduction to the History of Science.
Typist: Marcus