| helium |
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)
출처: wordnet.princeton.edu/perl/webwn
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| helium |
Helium (He) is a colorless, odorless, tasteless, non-toxic, nearly inert monatomic chemical element that heads the noble gas series in the periodic table and whose atomic number is 2. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions. Extreme conditions are also needed to create the small handful of helium compounds, which are all unstable at standard temperature and pressure. ...
출처: en.wikipedia.org/wiki/Helium
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| helium |
Helium was formed in 1992 by former Autoclave member Mary Timony with Shawn Devlin on drums and Brian Dunton on bass. Their first release was a 7" single of The American Jean in 1993, and then the 7" Hole in the Ground. They released their first EP Pirate Prude in 1994. In 1995 they released their first full length release The Dirt of Luck to critical acclaim and played the second stage of Lollapalooza. ...
출처: en.wikipedia.org/wiki/Helium_(band)
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| helium |
Helium is an element with the atomic number 2. It has two protons and two neutrons in its nucleus which is orbited by two electrons. It is the second most abundant element in the universe. It is created from hydrogen atoms in the process of nuclear fusion that occurs within stars. The Sun is about 25% Helium. Helium was named after the Sun (called "Helios" in Greek) because it was first discovered on the Sun by Jules Janssen in 1868. Helium is plentiful on the Sun and rare on Earth. ...
출처: www.enchantedlearning.com/subjects/astronomy/gloss...
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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.
출처: www.aeroplanemonthly.com/glossary/glossary_H.htm
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