i think its beacause it dosent stay in one spot (This person obviously knows nothing and should probably not try to spread their stupidity around). It isn't flammable because it doesn't react with other elements because it is an inert gas.
http://wiki.answers.com/Q/Why_is_helium_not_flammable
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As if its flammable, it is a noble gas, meaning it has enough electrons to keep it satisfied, and it will not burn with oxygen to make Helium oxide, like most other substances. to "make" helium do other things you have to do abnor...
http://yedda.com/questions/helium_flammable_gas_fire_50...
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Replacing hydrogen with helium sacrifices little lifting power, but gains the immense advantage of not being flammable. After World War I, the great advantages of helium-filled dirigibles and barrage balloons were evident, so there was great military interest in helium.
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www.du.edu/~jcalvert/phys/helium.htm
www.du.edu/~jcalvert/phys/helium.htm
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Helium was discovered in 1868 by a French astronomer by observation of the sun's spectrum. Its name is derived from the Greek helios, meaning the sun. It was thought at the time to be a metal, hence its name-ending -ium. ... It is the gas of choice for weather and birthday balloons since it is non-flammable.
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nobel.scas.bcit.ca/resource/ptable/he.htm
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Can you fill a balloon part way with helium, make an animal out of it and have it float? ... If we use the "Ideal Gas Law" we can quickly find the mass of the Helium or air in a 260. The "Ideal Gas Law says that m = PVM/RT where:
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www.balloonhq.com/faq/whyfly.html
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Helium. He. A colourless odourless tasteless gas; non- flammable; formed by the fusion of two hydrogen molecules; the second lightest element; forms more than 1/5 of the mass of the Universe, but is rare on Earth.
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www.johnpowell.net/gasman/10hydro.htm
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Helium tank rentals and sales in WA by Airy Greetings ... Although helium is not flammable, tanks should be stored so they can't fall over. A rope, chain or bungee cord securing it to something should be used. There is a lot of pressure inside and a tank could be a missile if the valve were to break off!
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www.ttballoons.com/ahelium.htm
www.ttballoons.com/ahelium.htm
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Helium - Wikipedia, the free encyclopedia
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Helium (pronounced /ˈhiːliəm/ ) is the chemical element with atomic number 2, and is represented by the symbol He . It is a colorless, odorless, tasteless, non-toxic, inert monatomic gas that...
en.wikipedia.org/wiki/Helium
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