Helium

Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions. Helium is the second lightest eleme...
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Helium

• (n.) A gaseous element found in the atmospheres of the sun and earth and in some rare minerals. • (n.) An inert, monoatomic, gaseous element occurring in the atmosphere of the sun and stars, and in small quantities in the earth`s atmosphere, in several minerals and in certain mineral waters. Symbol, He; at. wt., 4. Helium was first dete...
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helium

<element> A gas. Certain types of radiation therapy used charged, radioactive particles of helium. ... (16 Dec 1997) ...
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Helium

(from the article `Keesom, Willem Hendrik`) ...joined the faculty of the Utrecht veterinary school. Six years later he returned to Leiden as professor of experimental physics. At the Onnes ...
Found on http://www.britannica.com/eb/a-z/h/33

helium

(He) (he´le-әm) a chemical element, atomic number 2, atomic weight 4.003. It is a chemically inert element that is odorless, tasteless, and noncombustible.
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helium

(He) A prototype Venus balloon in a JPL cleanroom. Image credit: NASA/JPL-Caltech A colorless, odorless, unreactive gaseous element which is the second most abundant and second lightest element in the universe (after hydrogen). Helium is one of the inert gases (also k...
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helium

(He) Type: Term Pronunciation: hē′lē-ŭm Definitions: 1. A gaseous element present in minute amounts in the atmosphere (0.000524% of dry volume); atomic no. 2, atomic wt. 4.002602; used as a diluent of medicinal gases; used as a diluent of oxygen principally in nonmedical applications, and in its liquid form as the coolan...
Found on http://www.medilexicon.com/medicaldictionary.php?t=39654

Helium

[Haskell] Helium is a compiler and a dialect of the functional programming language Haskell. It has been designed to make learning Haskell easier by giving clearer error messages. It is being developed at Utrecht University, Netherlands, primarily by Arjan van IJzendoorn, Daan Leijen, Bastiaan Heeren and Rijk-Jan van Haaften. Certain langua...
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Helium

[operating system] Helium is a real-time kernel for the HC(S)08 processor core by Freescale and Atmel AVR. ...
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Helium

He'li·um (hē'lĭ*ŭm) noun [ New Latin , from Greek 'h`lios the sun.] (Chemistry) An inert, monoatomic, gaseous element occurring in the atmosphere of the sun and stars, and in small quantities in the earth's atmosphere, in several minerals and in certain mineral wate...
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Helium

He'li·um noun [ New Latin , from Greek ... the sun.] (Chemistry) A gaseous element found in the atmospheres of the sun and earth and in some rare minerals.
Found on http://www.encyclo.co.uk/webster/H/28

helium

a gas that's lighter-than-air.
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Helium

An inert colourless gas, one-sevcnth of the weight of air. It is preferable to hydrogen for use in airships because it is non-inflammable. Unfortunately it is very costly and is only found in workable quantities in North America, and it is twice as heavy as hydrogen.
Found on http://www.aeroplanemonthly.com/glossary/

Helium

An inert gaseous element. The atom is characterised by possessing two protons in its nucleus. Usually there two neutrons as well. This abundant form of helium is about four times as heavy as hydrogen. Helium accounts for just under one quarter of the atomic matter in the universe and was principally formed during the first few minutes after the big...
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Helium

An inert, rare gas, one part of which occurs in 200,000 parts of our atmosphere
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Helium

At room temperature, helium is a colourless and odourless gas. After hydrogen, it is the chemical element with the lowest density and has the lowest melting point of all elements. As with all other noble gases (neon, argon, krypton, xenon) helium is very inert. Therefore there are no known helium compounds in nature. Helium (helium I) changes state...
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helium

chemical element, inert gas of Group 0 (noble gases) of the periodic table. The second lightest element (only hydrogen is lighter), helium is a ... [53 related articles]
Found on http://www.britannica.com/eb/a-z/h/33

helium

Colourless, odourless, gaseous, non-metallic element, atomic number 2, relative atomic mass 4.0026. It is grouped with the noble gases (rare gases) in Group 0 of the periodic table. Helium is nonreactive because of its full outer shell of electrons and forms no compounds. It is the second most abundant element (after hydrogen) in the universe, ...
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Helium

Discovered : by Sir William Ramsay in London, and independently by P.T. Cleve and N.A. Langlet in Uppsala, Sweden in 1895Origin : The name is derived from the Greek ‘helios`,sunDescription :A colourless, odourless gas that is totally unreactive. It is extracted from natural gas wells, some of which contain gas that is 7% helium. It is used in...
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Helium

Element 2, atomic weight 4.0026. A colorless, odorless, inert gas, first discovered in the emission
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helium

He. Element 2, atomic weight 4.0026. A colorless, odorless, inert gas, first discovered in the emission spectrum of the sun in 1868.
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helium

helium (hē'lēum) , gaseous chemical element; symbol He; at. no. 2; at. wt. 4.0026; m.p. below -272°C at 26 atmospheres pressure; b.p. -268.934°C at 1 atmosphere pressure; density 0.1785 grams per liter at STP; valence usually 0.Spectroscopic evidence for the presence of heliu...
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Helium

Helium (symbol He) is a colorless, odorless, tasteless chemical element, one of the nearly inert noble gases of the periodic table of elements. Its boiling and melting points are the lowest among the elements; except in extreme conditions, it exists only as a gas. At extremely low temperatures, it is a superfluid, a nearly frictionless phase of mat...
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Helium

Helium is a gaseous element of the noble gas group with the symbol He.
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Helium

It is colourless, odourless, gaseous, non-metallic element.
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