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Hydrogen


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Description. Lang: en

Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. Non-remnant stars are mainly composed of hydrogen in the plasma state. The most common isotope of hydrogen, termed protium (name rarely used, symbol 1H), has one proton and no neutrons.
The universal emergence of atomic hydrogen first occurred during the recombination epoch (Big Bang). At standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas with the molecular formula H2. Since hydrogen readily forms covalent compounds with most nonmetallic elements, most of the hydrogen on Earth exists in molecular forms such as water or organic compounds. Hydrogen plays a particularly important role in acid–base reactions because most acid-base reactions involve the exchange of protons between soluble molecules. In ionic compounds, hydrogen can take the form of a negative charge (i.e., anion) when it is known as a hydride, or as a positively charged (i.e., cation) species denoted by the symbol H+. The hydrogen cation is written as though composed of a bare proton, but in reality, hydrogen cations in ionic compounds are always more complex. As the only neutral atom for which the Schrödinger equation can be solved analytically, study of the energetics and bonding of the hydrogen atom 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 1766–81, 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 natural gas, and less often from 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. Hydrogen is problematic in metallurgy because it can embrittle many metals, complicating the design of pipelines and storage tanks.
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Hydrogen

Hydrogen

Chemical element

  • Desc: Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table.
  • Wiki: https://en.wikipedia.org/wiki/Hydrogen
  • Type: Thing
  • Result Score: 6539.44
Hydrogen peroxide

Hydrogen peroxide

Chemical compound

  • Desc: Hydrogen peroxide is a chemical compound with the formula H ₂O ₂. In its pure form, it is a very pale blue liquid, slightly more viscous than water. Hydrogen peroxide is the simplest peroxide. It is used as an oxidizer, bleaching agent, and antiseptic.
  • Wiki: https://en.wikipedia.org/wiki/Hydrogen_peroxide
  • Type: Thing
  • Result Score: 1285.00
Water

Water

Chemical compound

  • Desc: Water is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms.
  • Wiki: https://en.wikipedia.org/wiki/Water
  • Type: Thing
  • Result Score: 1269.57
Sodium bicarbonate

Sodium bicarbonate

Chemical compound

  • Desc: Sodium bicarbonate, commonly known as baking soda or bicarbonate of soda, is a chemical compound with the formula NaHCO₃. It is a salt composed of a sodium cation and a bicarbonate anion.
  • Wiki: https://en.wikipedia.org/wiki/Sodium_bicarbonate
  • Type: Thing
  • Result Score: 1087.39
Bicarbonate

Bicarbonate

Chemical compound

  • Desc: In inorganic chemistry, bicarbonate is an intermediate form in the deprotonation of carbonic acid. It is a polyatomic anion with the chemical formula HCO⁻ ₃. Bicarbonate serves a crucial biochemical role in the physiological pH buffering system. The term "bicarbonate" was coined in 1814 by the English chemist William Hyde Wollaston.
  • Wiki: https://en.wikipedia.org/wiki/Bicarbonate
  • Type: Thing
  • Result Score: 949.23
Ammonia

Ammonia

Pharmaceutical

  • Desc: Ammonia is a compound of nitrogen and hydrogen with the formula NH₃. A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a characteristic pungent smell.
  • Wiki: https://en.wikipedia.org/wiki/Ammonia
  • Type: Thing
  • Result Score: 805.08
Hydrogen sulfide

Hydrogen sulfide

Chemical compound

  • Desc: Hydrogen sulfide is the chemical compound with the formula H ₂S. It is a colorless chalcogen hydride gas with the characteristic foul odor of rotten eggs. It is poisonous, corrosive, and flammable.
  • Wiki: https://en.wikipedia.org/wiki/Hydrogen_sulfide
  • Type: Thing
  • Result Score: 636.32
Acetic acid

Acetic acid

Chemical compound

  • Desc: Acetic acid, systematically named ethanoic acid, is a colourless liquid organic compound with the chemical formula CH₃COOH. When undiluted, it is sometimes called glacial acetic acid.
  • Wiki: https://en.wikipedia.org/wiki/Acetic_acid
  • Type: Thing
  • Result Score: 622.98
Hydrogen bond

Hydrogen bond

Chemical bond

  • Desc: A hydrogen bond is a partial intermolecular bonding interaction between a lone pair on an electron rich atom, particularly the second-row elements nitrogen, oxygen, or fluorine, and the antibonding molecular orbital of a bond between hydrogen and a more electronegative atom or group.
  • Wiki: https://en.wikipedia.org/wiki/Hydrogen_bond
  • Type: Thing
  • Result Score: 527.52
Boric acid

Boric acid

Chemical compound

  • Desc: Boric acid, also called hydrogen borate, boracic acid, and orthoboric acid is a weak, monobasic Lewis acid of boron. However, some of its behaviour towards some chemical reactions suggest it to be tribasic acid in the Brønsted sense as well.
  • Wiki: https://en.wikipedia.org/wiki/Boric_acid
  • Type: Thing
  • Result Score: 517.90
Sucralfate

Sucralfate

Medication

  • Desc: Sucralfate, sold under various brand names, is a medication used to treat stomach ulcers, gastroesophageal reflux disease, radiation proctitis, and stomach inflammation and to prevent stress ulcers.
  • Wiki: https://en.wikipedia.org/wiki/Sucralfate
  • Type: Thing
  • Result Score: 506.28
Hydrogen cyanide

Hydrogen cyanide

Chemical compound

  • Desc: Hydrogen cyanide, sometimes called prussic acid, is a chemical compound with the chemical formula HCN. It is a colorless, extremely poisonous and flammable liquid that boils slightly above room temperature, at 25.6 °C.
  • Wiki: https://en.wikipedia.org/wiki/Hydrogen_cyanide
  • Type: Thing
  • Result Score: 445.60
Formic acid

Formic acid

Chemical compound

  • Desc: Formic acid, systematically named methanoic acid, is the simplest carboxylic acid, and has the chemical formula HCOOH. It is an important intermediate in chemical synthesis and occurs naturally, most notably in some ants.
  • Wiki: https://en.wikipedia.org/wiki/Formic_acid
  • Type: Thing
  • Result Score: 379.08
Hydrofluoric acid

Hydrofluoric acid

Chemical compound

  • Desc: Hydrofluoric acid is a solution of hydrogen fluoride in water. Solutions of HF are colourless, acidic and highly corrosive. It is used to make most fluorine-containing compounds; examples include the commonly used pharmaceutical antidepressant medication fluoxetine and the material PTFE.
  • Wiki: https://en.wikipedia.org/wiki/Hydrofluoric_acid
  • Type: Thing
  • Result Score: 336.20
Hydrogen chloride

Hydrogen chloride

Chemical compound

  • Desc: The compound hydrogen chloride has the chemical formula HCl and as such is a hydrogen halide. At room temperature, it is a colourless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric water vapor.
  • Wiki: https://en.wikipedia.org/wiki/Hydrogen_chloride
  • Type: Thing
  • Result Score: 292.12
Hydrogen fluoride

Hydrogen fluoride

Chemical compound

  • Desc: Hydrogen fluoride is a chemical compound with the chemical formula HF. This colorless gas or liquid is the principal industrial source of fluorine, often as an aqueous solution called hydrofluoric acid.
  • Wiki: https://en.wikipedia.org/wiki/Hydrogen_fluoride
  • Type: Thing
  • Result Score: 287.36
Hydroxide

Hydroxide

Chemical compound

  • Desc: Hydroxide is a diatomic anion with chemical formula OH⁻. It consists of an oxygen and hydrogen atom held together by a covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. It functions as a base, a ligand, a nucleophile, and a catalyst.
  • Wiki: https://en.wikipedia.org/wiki/Hydroxide
  • Type: Thing
  • Result Score: 286.85
Tritium

Tritium

Isotope

  • Desc: Tritium or hydrogen-3 is a rare and radioactive isotope of hydrogen. The nucleus of tritium contains one proton and two neutrons, whereas the nucleus of the common isotope hydrogen-1 contains just one proton, and that of hydrogen-2 contains one proton and one neutron.
  • Wiki: https://en.wikipedia.org/wiki/Tritium
  • Type: Thing
  • Result Score: 244.07
Deuterium

Deuterium

Isotope

  • Desc: Deuterium is one of two stable isotopes of hydrogen. The nucleus of a deuterium atom, called a deuteron, contains one proton and one neutron, whereas the far more common protium has no neutrons in the nucleus.
  • Wiki: https://en.wikipedia.org/wiki/Deuterium
  • Type: Thing
  • Result Score: 238.18
Potassium bicarbonate

Potassium bicarbonate

Chemical compound

Sodium bisulfite

Sodium bisulfite

Chemical compound

  • Desc: Sodium bisulfite is a chemical mixture with the approximate chemical formula NaHSO₃. Sodium bisulfite in fact is not a real compound, but a mixture of salts that dissolve in water to give solutions composed of sodium and bisulfite ions.
  • Wiki: https://en.wikipedia.org/wiki/Sodium_bisulfite
  • Type: Thing
  • Result Score: 164.92
Ammonium bicarbonate

Ammonium bicarbonate

Chemical compound

  • Desc: Ammonium bicarbonate is an inorganic compound with formula HCO₃, simplified to NH₅CO₃. The compound has many names, reflecting its long history. Chemically speaking, it is the bicarbonate salt of the ammonium ion. It is a colourless solid that degrades readily to carbon dioxide, water and ammonia.
  • Wiki: https://en.wikipedia.org/wiki/Ammonium_bicarbonate
  • Type: Thing
  • Result Score: 164.85
Dipotassium phosphate

Dipotassium phosphate

Chemical compound

  • Desc: Dipotassium phosphate is the inorganic compound with the formula K₂HPO₄ₓ. Together with monopotassium phosphate, it is often used as a fertilizer, food additive, and buffering agent. It is a white or colorless solid that is soluble in water.
  • Wiki: https://en.wikipedia.org/wiki/Dipotassium_phosphate
  • Type: Thing
  • Result Score: 151.48
Hydrogen astatide

Hydrogen astatide

Chemical compound

  • Desc: Hydrogen astatide, also known as astatine hydride, astatane, astidohydrogen or hydroastatic acid, is a chemical compound with the chemical formula HAt, consisting of an astatine atom covalently bonded to a hydrogen atom. It thus is a hydrogen halide.
  • Wiki: https://en.wikipedia.org/wiki/Hydrogen_astatide
  • Type: Thing
  • Result Score: 37.93

Vodorod 2011, OOO

Production company

  • Type: Thing, Organization
  • Result Score: 25.03
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