Definitions for Hydrogen
ˈhaɪ drə dʒənhy·dro·gen

Princeton's WordNetRate this definition:0.0 / 0 votes

1. hydrogen, H, atomic number 1noun

   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

WiktionaryRate this definition:3.0 / 1 vote

1. hydrogennoun

   The lightest chemical element (symbol H) with an atomic number of 1 and atomic weight of 1.00794.

2. hydrogennoun

   Molecular hydrogen (H), a colourless, odourless and flammable gas at room temperature.

3. hydrogennoun

   An atom of the element.

4. hydrogennoun

   A sample of the element.

5. Etymology: From hydrogène, coined by Louis-Bernard Guyton de Morveau, from ὕδωρ + γεννάω.

WikipediaRate this definition:0.0 / 0 votes

1. Hydrogen

   Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula H2. It is colorless, odorless, tasteless, non-toxic, and highly combustible. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all normal matter. Stars such as the Sun are mainly composed of hydrogen in the plasma state. Most of the hydrogen on Earth exists in molecular forms such as water and organic compounds. For the most common isotope of hydrogen (symbol 1H) each atom has one proton, one electron, and no neutrons. In the early universe, the formation of protons, the nuclei of hydrogen, occurred during the first second after the Big Bang. The emergence of neutral hydrogen atoms throughout the universe occurred about 370,000 years later during the recombination epoch, when the plasma had cooled enough for electrons to remain bound to protons.Hydrogen is nonmetallic (except it becomes metallic at extremely high pressures) and readily forms a single covalent bond with most nonmetallic elements, forming compounds such as water and nearly all organic compounds. Hydrogen plays a particularly important role in acid–base reactions because these reactions usually involve the exchange of protons between soluble molecules. In ionic compounds, hydrogen can take the form of a negative charge (i.e., anion) where it is known as a hydride, or as a positively charged (i.e., cation) species denoted by the symbol H+. The H+ cation is simply a proton (symbol p) but its behavior in aqueous solutions and in ionic compounds involves screening of its electric charge by nearby polar molecules or anions. Because hydrogen is the only neutral atom for which the Schrödinger equation can be solved analytically, the study of its energetics and chemical bonding has played a key role in the development of quantum mechanics. Hydrogen gas was first artificially produced in the early 16th century by the reaction of acids on metals. In 1766–1781, Henry Cavendish was the first to recognize that hydrogen gas was a discrete substance, and that it produces water when burned, the property for which it was later named: in Greek, hydrogen means "water-former". Industrial production is mainly from steam reforming of natural gas, oil reforming, or coal gasification. A small percentage is also produced using more energy-intensive methods such as the electrolysis of water. Most hydrogen is used near the site of its production, the two largest uses being fossil fuel processing (e.g., hydrocracking) and ammonia production, mostly for the fertilizer market. It can be burned to produce heat or combined with oxygen in fuel cells to generate electricity directly, with water being the only emissions at the point of usage. Hydrogen atoms (but not gaseous molecules) are problematic in metallurgy because they can embrittle many metals.

ChatGPTRate this definition:0.0 / 0 votes

1. hydrogen

   Hydrogen is a chemical element with the symbol H, and it is the lightest and most abundant element in the universe. It is colorless, odorless, nonmetallic, tasteless, and highly flammable in its gaseous state. Hydrogen can be found in great abundance in water, organic compounds, and in many minerals. Despite its wide occurrence, it does not occur naturally as a gas on Earth — it is always combined with other elements. Hydrogen is important in various fields, including the petroleum, chemical, and food industries. It is also a vital component in the operation of fuel cells and other forms of clean, renewable energy.

Webster DictionaryRate this definition:3.0 / 1 vote

1. Hydrogennoun

   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

2. Etymology: [Hydro-, 1 + -gen: cf. F. hydrogne. So called because water is generated by its combustion. See Hydra.]

WikidataRate this definition:0.0 / 0 votes

1. Hydrogen

   Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element and its monatomic form is the most abundant chemical substance, constituting roughly 75% of the Universe's baryonic mass. Non-remnant stars are mainly composed of hydrogen in its plasma state. At standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas with the molecular formula H2. Most of the hydrogen on Earth is in molecules such as water and organic compounds because hydrogen readily forms covalent compounds with most non-metallic elements. Hydrogen plays a particularly important role in acid–base chemistry with many reactions exchanging protons between soluble molecules. In ionic compounds, it can take a negative charge, or as a positively charged species H+. The latter cation is written as though composed of a bare proton, but in reality, hydrogen cations in ionic compounds always occur as more complex species. The most common isotope of hydrogen is protium with a single proton and no neutrons. As the simplest atom known, the hydrogen atom has been of theoretical use. For example, as the only neutral atom with an analytic solution to the Schrödinger equation, the study of the energetics and bonding of the hydrogen atom played a key role in the development of quantum mechanics.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Hydrogen

   hī′dro-jen, 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. [A word coined by Cavendish (1766) from Gr. hydōr, water, and genēs, producing.]

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Hydrogen

   Hydrogen. The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight 1. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM.

The Standard Electrical DictionaryRate this definition:0.0 / 0 votes

1. Hydrogen

   An element existing under all except the most extreme artificial conditions of pressure and cold as a gas. It is the lightest of known substances. Atomic weight, 1; molecular weight, 2; equivalent, 1; valency, 1; specific gravity, .0691-.0695. (Dumas & Boussingault.) It is a dielectric of about the same resistance as air. Its specific inductive capacity at atmospheric pressure is:     .9997 (Baltzman)   .9998 (Ayrton) Electro-chemical equivalent, .0105 milligram. The above is usually taken as correct. Other values are as follows: .010521 (Kohllrausch)   .010415 (Mascart) The electro-chemical equivalent of any element is obtained by multiplying its equivalent by the electro-chemical equivalent of hydrogen. The value .0105 has been used throughout this book.

British National Corpus

1. Written Corpus Frequency

   Rank popularity for the word 'Hydrogen' in Written Corpus Frequency: #3805

2. Nouns Frequency

   Rank popularity for the word 'Hydrogen' in Nouns Frequency: #2682

How to pronounce Hydrogen?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say Hydrogen in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of Hydrogen in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of Hydrogen in Pythagorean Numerology is: 6

Examples of Hydrogen in a Sentence

1. Sylvestre Lacour:

   Our analysis showed that HR 8799e has an atmosphere containing far more carbon monoxide than methane -- something not expected from equilibrium chemistry, we can best explain this surprising result with high vertical winds within the atmosphere preventing the carbon monoxide from reacting with hydrogen to form methane.

2. Huang Libin:

   We believe that hydrogen fuel cell vehicles and pure electric vehicles will coexist and complement each other for a long time to meet the needs of transportation and people's travel.

3. Charles Kilpatrick:

   Unlike its normal behavior right after it exploded, the hydrogen interaction revealed it's kind of this oddball supernova, but it's exceptional that we were able to find its progenitor star in Hubble data. In four or five years, I think we will be able to learn more about what happened.

4. Peter Altmaier:

   The time is ripe for hydrogen and the necessary technologies, we will have to tap into its potential to create value, to secure jobs and to explore and utilize that for climate protection.

5. Hunter Waite:

   This( molecular hydrogen) is just like the icing on the cake, now, you see the chemical energy source that microbes could use. The only thing we haven't seen is phosphorus and sulfur, and that's probably because they were in small enough quantities that we didn't see them. We have to go back and look and search for signs of life as well.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=Hydrogen
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Hydrogen
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Hydrogen
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/Hydrogen
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=Hydrogen
7. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=Hydrogen
8. ^ The Standard Electrical Dictionary
   https://www.gutenberg.org/cache/epub/26535/pg26535-images.html#:~:text=Hydrogen