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.
simplest atom, consisting only of one proton and one electron; the most abundant element in the Universe.
the lightest known gas; hydrogen vapors are highly flammable, colorless, odorless, tasteless, and nontoxic. Hydrogen is used as a means of providing a reducing atmosphere, as a carrier gas for epitaxial processes, and as a reagent to produce high-purity water. It sometimes is used in gas mixtures of fluorine-based plasma etchant for the processing of silicon dioxide film. Also see dry plasma etch.
An in flammable, colorless, odorless, gaseous chemical element the lightest of all known substances.
A colorless and odorless gaseous element. The lightest and apparently the most abundant chemical element in the universe. However, it is found only in trace quantities in the observable portion of our atmosphere, only about 0.00005 percent by volume of dry air. Hydrogen has a molecular weight of 2.0160 and specific gravity referred to air of 0.0695. At one time hydrogen was the commonly used inflation gas for meteorological balloons, but because of its dangerous combustibility, it has been largely replaced by helium.
A nontoxic, non corrosive gas. Uses include production of synthetic ammonia and methanol, production of hydrochloric acid, and refining petroleum. Hazard: Highly flammable and explosive, simple asphyxiant.
A gaseous diatomic element. The atom consists of one proton and one electron.
A common gas used in semiconductor processing. One must be cautious of the explosive nature of hydrogen.
The first element on the periodic table, is a gas, and has an atomic mass of 1.00794 amu. It was discovered in 1766 by Henry Cavendish of England. Hydrogen is also special because it is the most common element in the universe. "Hydrogen" is Greek for "forming water," as hydrogen makes up 11% of water. All heavier elements are built from hydrogen, as well as helium. It is debated whether hydrogen is a metal or a nonmetal, and has been placed both above lithium and next to helium in the periodic table, while sometimes it is off on its own. Hydrogen melts at -259.34 degrees Celsius, and freezes at -252.87 degrees Celsius. The density of Hydrogen at STP (20 degrees C, 1 atm) is 0.0899 g/L
(H) H; protium. Element 1, atomic weight 1.00797. The most abundant element in the universe. Hydrogen occurs as H2 at ambient temperature and pressure, a colorless, odorless, and extremely flammable gas. Discovered in 1766 by Cavendish.
The lightest known gas which has been, and still is, extensively used in airships and balloons. Its one great drawback is that it is highly inflammable and this undesirable characteristic has been the cause of many disasters. Because of this the heavier gas, helium, is more suitable for airship use. Hydrogen has one-fourteenth the weight of air and is one-half the weight of helium. One thousand cubic feet of hydrogen will lift 70.746lb. One thousand cubic feet of helium will lift 65.57lb.
H, flammable colorless gas.
the lightest and most abundant element in the Universe. A hydrogen atom consists of one proton and one electron. Hydrogen composes nearly 95 percent of the Sun, but only tiny amounts are found on the Earth.
a colorless, odorless, highly flammable gaseous element
The lightest of the elements. Hydrogen occurs in three forms: protium, deuterium, and tritium, which differ in the number of neutrons they contain. - WebElements: Hydrogen
usually an odorless, tasteless element, with an atomic number of 1. Symbolized as H.
The lightest element and is found as a gas.
a nonmetallic element that is the simplest and lightest of the elements, is normally a colorless, odorless highly flammable gas, and is used especially in synthesis What is an Ecosystem
The smallest and most common atom in the Universe.
The simplest element. Atomic Number 1. Hydrogen gas has a specific gravity of 0.0694 (air = 1), so it is much lighter than air. Hydrogen is highly flammable, forming water upon combustion. Explosive limits are 4% to 75%.
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
a nonmetallic element that is the simplest and lightest of the elements, and is normally a colorless odorless highly flammable diatomic (two atoms) gas.
a gaseous colorless odorless highly flammable chemical element that is the lightest of the elements.
The most abundant element in the Universe, its most common isotope has a single electron orbiting a proton.. Atomic hydrogen formed from the decoupling of electrons about 300,000 years after the Big Bang. It is the prime fuel for nucleosynthesis in stars. Its fusion into helium is the source of energy for main sequence stars such as our Sun.
A huge amount of interest and increasing research budgets are going into the development of fuel cells and parts of the so-called â€˜hydrogen economyâ€™. Fuel cells need hydrogen to produce electricity. Producing hydrogen by using natural gas or other fossil fuels, instead of renewables, as a fuel is only a â€˜stop-gapâ€™ measure in the transition to a CO2â€“free energy economy. Renewable energies need to be harnessed as the real power source for a sustainable hydrogen economy. Back up
The most abundant element in the universe. It radiates naturally at a wavelength of 21 centimeters.
light, colorless, odorless gas: Hydrogen combines with oxygen to form water.
The first element on the periodic table. Hydrogen is a flammable gas that is lighter than air and exists in its natural state as H.
A colorless, odorless gas that is the simplest and most common element in the universe.
The simplest and most common element (symbol: H) in the universe. It consists of only one proton and one electron. Hydrogen shows great promise as a clean and limitless fuel. But elemental hydrogen is rare on Earth since it usually occurs chemically bonded with other elements in compounds. Methanol, gasoline, and water all contain hydrogen.
Reactive, colourless, odourless, and tasteless gaseous element with atomic number of 1. Element is usually classed in group 1 (or Ia) of periodic table. Lightest of all gases, hydrogen combines with carbon to form a variety of gaseous, liquid and solid hydrocarbons.
Hydrogen (H) is the most abundant element in the universe but it is generally bonded to another element. Hydrogen gas (H2) is a diatomic gas composed of hydrogen atoms and is colorless and odorless. Hydrogen is flammable when mixed with oxygen over a wide range of concentrations.
The lightest of all gases, the element (hydrogen) occurs chiefly in combination with oxygen in water. It also exists in acids, bases, alcohols, petroleum, and other hydrocarbons.
A colorless, highly flammable gaseous element used in producing synthetic ammonia and methanol, in petroleum refining, as a reducing atmosphere, and in oxyhydrogen torches and rocket fuels.
H is the chemical formula sign for hydrogen, the lightest element of the periodic system and the most frequent of the universe. Hydrogen usually exists as a hydrogen molecule consisting of two hydrogen atoms (H2), or combined otherwise (e.g. water - H2O organic substances). As a secondary energy source, hydrogen is regarded as the key element of a renewable global energy supply.
Hydrogen is an inert gas and the lightest, most abundant gas in the universe. It is believed it could be used as a substitute for helium in deep commercial and military diving.
The lightest chemical element. A component of water, and a frequent product of many chemical reactions. pH is a measure of hydrogen in its ionic form in water.
Colourless, tasteless gas that burns to form water vapour.
The lightest and most abundant element in the universe. A hydrogen atom consists of one proton and one electron. Hydrogen comprises about 75 percent of the Sun, but only a tiny fraction of Earth.
Smallest and lightest element in the periodic system. Hydrogen consists of a negatively charged electron and a positively charged proton. It is the most common element in the universe, but because of its reactivity it is almost always found in combination with other substances. Examples include water and hydrocarbons such as natural gas and crude oil. In its free state, only traces of hydrogen are found in the atmosphere and in volcanic gases. Hydrogen is a colorless, odorless and tasteless gas.
The simplest and lightest element. It makes up more than 90% of the material in the universe.
A Colorless, odorless gas. It is the lightest
A chemical element that can be used as a fuel since it has a very high energy content.
The simpliest and lightest of the elements, that is normally a colorles, ordorless highly flammable diatomic gas, that occurs in the free state only sparely on the earth and in its atmosphere though abundantly in the sun
The lightest, simplest, and most abundant element in the universe.
Lightest chemical element. Found abundantly in water and most chemical reactions.
Hydrogen is a colorless, odourless and highly flammable gas. It is the chemical element with the atomic number 1. Hydrogen is the lightest of the chemical elements and has the simplest atomic structure, a single electron orbiting a nucleus consisting of a single proton. Hydrogen is by far the commonest element in the universe, although not on the earth, where it occurs chiefly combined with oxygen as water.
The lightest and most abundant element. A hydrogen atom consists of one proton and one electron. A hydrogen nucleus is just a single proton. Hydrogen composes about 75 percent of the Sun but only a tiny fraction of the Earth.
The most common element in the universe. Each atom of hydrogen contains one proton and one electron.
A colorless, flammable gas (according to Zeppelin.)
A colorless, odorless, highly flammable gas used in hydrogenation of petroleum and for producing ammonia. Also, an important constituent of manufactured gas.
Colourless, odourless, tasteless gas that is only slightly soluble in water; it is the least dense gas known. A base element listed on the periodic table of elements.
Hydrogen: Diatomic gas, atomic number 1. The lightest element, very reactive and powerful reducing agent. Used as a secondary plasma gas in the plasma spraying process. Used as a fuel gas in combustion thermal spray processes. Impregnation Impregnation: A process of filling the pores of a coating with resin, wax or oil. See “Seal Coat” and “Vacuum Impregnation”.
(H 2 ) Diatomic gas, atomic number 1, The lightest element, very reactive and powerful reducing agent. Used as a secondary plasma gas in the plasma spraying process and as a fuel gas in combustion thermal spray processes ( CWS , CPS and HVOF )
A chemical element consisting of one proton and one electron. Two hydrogen atoms combine with one oxygen atom to form a molecule of water. Hydrogen serves as the fuel for most fuel cells. Hydrogen forms water when combusted, or when otherwise joined with air, as within a fuel cell.
an inert gas, and lightest of all the elements, has been used in experimental diving situations.
At standard temperature and pressure, it is a colourless, odourless, non-metallic, highly flammable gas. Hydrogen is the lightest and most abundant element in the universe, and able to react chemically with most other elements. It is used as an alternative fuel and as a power-source for fuel cells.
Colorless, odorless and tasteless gas; combines with oxygen to form water.
The most plentiful element in the universe and one present in all organic compounds. Hydrogen is a gas with an atomic number of 1 and the symbol H. See the entire definition of Hydrogen
The lightest chemical element. A hydrogen atom consists of one proton and one electron. It is a gas at room temperatures. Hydrogen and oxygen combined in the ratio of 2 to 1 make up water.
The smallest and lightest chemical element (chemical symbol: H). Occurring naturally as a gas, but also one of the main building stones of water, proteins, fats and sugars. The protons or hydrogen nuclei behave like tiny compass needles, and can be influenced by strong external magnetic fields, as in MRI.
atomic symbol, H, argon is the 1st element in the periodic table (atomic number 1) with an atomic weight of 1.008. Hydrogen is flammable and or explosive in the range of 4.0-93.9% in air and is an asphyxiant. Hydrogen is used to generate steam in furnaces by reacting with oxygen, as a pre-clean and carrier Gas during epitaxy, and as a constituent of annealing gases.
Hydrogen is a colorless, highly flammable gaseous element, the lightest of all gases and the most abundant element in the universe.
A colorless, odorless, highly flammable gas used in hydrogeneration of petroleum and to produce ammonia.
The lightest and most abundant element of the universe, represented by the symbol "H" on the periodic table of elements. At room temperature hydrogen is found as diatomic H2 gas, but when cooled to very low temperatures below -253° C (-423° F) it becomes a liquid.
The most common element in the universe. Used as a fuel on its own or in combination with other fuels such as natural gas.
H is the chemical symbol for hydrogen, the lightest element of the table of elements and the most abundant element of the universe. In general, hydrogen will be found in molecular form, i.e. as a hydrogen molecule composed of two hydrogen atoms (H2), or in other compounds (e.g. in water – H2O, organic substances). Hydrogen as secondary energy carrier is seen as the key component of a global renewable world energy supply.
The lightest chemical element. It is a component of water and a product of many chemical reactions. pH is a measure of ositive ydrogen ions in water.
One of the key elements on planet earth. It is abundantly distributed throughout nature, especially as a component of water and in nearly all organic compounds.
The only gas which dissolves to any extent in aluminium.
Hydrogen is the element with the atomic number 1. It is the lightest element and the most abundant in the universe. Its nucleus is a single proton which is orbited by one electron. It fuels nuclear fusion that occurs within stars, converting hydrogen into helium. The sun is 75% hydrogen.
The first, simplest and lightest element on the periodic table of elements. Sometimes called the glue of life as it joins and holds atoms and molecules together, to form more complex molecules.