Helium

Word HELIUM
Character 6
Hyphenation he li um
Pronunciations /ˈhiːli.əm/

Definitions and meanings of "Helium"

What do we mean by helium?

A colorless, odorless inert gaseous element occurring in natural gas and with radioactive ores. It is used as a component of artificial atmospheres and laser media, as a refrigerant, as a lifting gas for balloons, and as a superfluid in cryogenic research. Atomic number 2; atomic weight 4.0026; boiling point −268.9°C; density at 0°C 0.1785 gram per liter. cross-reference: Periodic Table. noun

A hypothetical elementary substance, known only by the lines ascribed to it in the solar spectrum. noun

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. It is obtained from natural gas in industrial quantities. Symbol, He; atomic number 2; at. wt., 4.0026 (C=12.011). Helium was first detected spectroscopically in the sun by Lockyer in 1868; it was first prepared by Ramsay in 1895. Helium has a density of 1.98 compared with hydrogen, and is more difficult to liquefy than the latter. Chemically, it is an inert noble gas, belonging to the argon group, and cannot be made to form compounds. The helium nucleus is the charged particle which constitutes alpha rays, and helium is therefore formed as a decomposition product of certain radioactive substances such as radium. The normal helium nucleus has two protons and two neutrons, but an isotope with only one neutron is also observed in atmospheric helium at an abundance of 0.013 %. Liquid helium has a boiling point of -268.9° C at atmospheric pressure, and is used for maintaining very low temperatures, both in laboratory experimentation and in commercial applications to maintain superconductivity in low-temperature superconducting devices. Gaseous helium at normal temperatures is used for buoyancy in blimps, dirigibles, and high-altitude balloons, and also for amusement in party balloons. noun

A colorless and inert gas, and the second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602. noun

A form or sample of the element. noun

A very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas) noun

The second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.

A form or sample of the element.

Synonyms and Antonyms for Helium

  • Antonyms for helium
  • Helium antonyms not found!

The word "helium" in example sentences

The laggards will be consumer spending, especially on cyclically sensitive items, and housing, where the helium is already starting to come out of the balloon. ❋ Unknown (2006)

In 1868 Sir Norman Lockyer detected a light coming from the prominences of the sun which was not given by any substance known on earth, and attributed this to an unknown gas which he called helium, from the Greek ❋ J. Arthur Thomson (1897)

The sentence “helium is a noble gas” clearly implies a particular definition of ‘noble’: the technical chemical definition, which means something like ‘inert’. ❋ Unknown (2010)

In other words, one could not really argue that helium is more intentional than hydrogen or sulphur. ❋ Unknown (2009)

(Ground-supplied helium is used pre-launch to keep the tank pressurized.) ❋ Unknown (2009)

If helium is that much better than hot air, how much better is hydrogen than helium? ❋ Unknown (2008)

We cannot get too significant quantities of helium from the sun ¬ — which can be viewed as a helium factory 93 million miles away — nor will we ever produce helium in anywhere near the quantities we need from earth-bound factories. ❋ Unknown (2008)

As the uranium and thorium decay, some of the helium is trapped along with natural gas deposits in certain geological formations. ❋ Unknown (2008)

I would guess that the sun is going to get hotter anyway (as it is burning hydrogen and becoming richer in helium) but that stopping human-driven warming will get us another few thousand years to work out a solution to the solar-driven warming. ❋ Unknown (2006)

Thus the maximum velocity reachable by helium is about 3.33 times that for argon. ❋ Unknown (2003)

And the chamber inside the envelope that expands and contracts to compensate for changes in helium pressure is called a ballonet. ❋ Unknown (2003)

In this case naturally-occurring helium is used, of course, that is, the usual and cheaper form of helium, 4He. ❋ Unknown (2003)

If liquid helium is cooled to even lower temperatures, dramatic differences arise between the liquids of the two isotopes; quantum physical effects appear that cause the liquids to lose all their resistance to internal movement, they become superfluid. ❋ Unknown (2003)

Liquid helium is used widely as a coolant, in superconducting magnets, for example. ❋ Unknown (2003)

Superfluidity is a remarkable and unusual property that had previously been observed only in helium-4. ❋ Unknown (1997)

A fascinating application of superfluidity in helium-3 ❋ Unknown (1996)

This phenomenon, which is also known from superfluid helium-4, has in helium-3 led to extensive research since its vortices can assume more complicated forms. ❋ Unknown (1996)

Cornell University, Ithaca, New York, USA for their discovery of superfluidity in helium-3. ❋ Unknown (1996)

Although many research groups had worked with the problem for years, particularly during the 1960s, none had succeeded and many considered that it would never be possible to achieve superfluidity in helium-3. ❋ Unknown (1996)

(American Physical Society) 1980 for the discovery of superfluidity in helium-3. ❋ Unknown (1996)

Cross Reference for Helium

  • Helium cross reference not found!

What does helium mean?

Best Free Book Reviews
Book Name Author
Cherry Picking E-Book Lexy Timms
Silenced Girls E-Book Roger Stelljes
The Tempting Minx E-Book Laura A. Barnes
A Viking's Shadow E-Book H L Marsay
Seed Money E-Book B. E. Baker
Best IOS App Reviews