Helium
Helium(German Helium, British helium) atomic number 2, an element of the symbol of an element He. I am colorless and am unscented and am tasteless, and it is the rare gas element which is the lightest in non-toxicity. The boiling point becomes the solid only under pressurization in all elements low most. There is the helium as inert single atom gas. In addition, subsequently hydrogen secondly has much abundance in space. The helium holds 0.0005% of the atmosphere of the earth and adapts myself to it in a mineral and the mineral water. I bring with natural gas abundantly, and it is used as gas for floatage of a balloon and the small airship and does liquid helium with low temperature material of the superconduction use, and it is used as breathing gas when I go into the deep sea. There is the helium as single atom gas in normal condition. You must put it in the very special condition bottom to solidify helium. Even if the boiling point lowers temperature under the normal pressure in an element lowest, and it is it in an absolute zero point, there is it as liquid for an uncertainty principle, and it is necessary to put higher pressure to solidify it. Liquid and difference 5.19 of the critical temperature of the gas have only K. The solid helium is different from helium 3 in the pressure that it is helium 4, and is necessary and I regulate pressure and can control 30% of the volume. The helium has very high specific heat and becomes the steam that the density is high and I am quick and expand when the temperature of the room rises. There can be solid helium 1.5 only under K, the very low temperature called 2.5-3.5 MPa and the loud pressure. Generally it causes phase transition when I become it than temperature like this. I make the molecule of the cube figure with the temperature less than this each. I am important, and two liquid states, helium I and helium II of helium -4 develop in the absolute zero point that a material is charged with superconduction at near super low temperature in a quantum-mechanical study (a superfluidity phenomenon). Because the helium is lighter than the air, it is used as gas for floatage, and it is used for a balloon for balloon and astronomical observation for advertisements, a military reconnaissance balloon. Because there is floatage power of 92.64% of the hydrogen, and the helium does not burn, the gas of the balloon is wide as the gas which is safer than the hydrogen, and it is used. There are the following other uses. Helium (British:) Helium is rare: ἥAs for origin), the French Pierre Jean sun and British Norman rocker foretold existence separately each in λ ι ο, helios, the sun in 1868. All two of them studied the sunbeam of the solar eclipse which the age had and noticed that there was an unknown element from a bright-line spectrum in the spectroscopy. Edward Frankland proved a prediction of Jantzen and suggested the name that was able to thrust -ium to the name of sun god Helios of the Greek myth because, furthermore, the element was discovered by solar observation. - ium was originally the derivation noun neutrality end of a word of the Latin to attach to the metal, but this was because helium seemed with metal at this point in time. The symbol of an element He is the initial. There did not need to be the thing that a helium simple substance is extracted by an uranium ore and understood the thing that there is not in refined result metal, but a name is changed by Lord William Ramsey British in 1895. Swedish chemist Niels Lang let and Peer Theo Dole succeeded in separation of the helium with Ramsey separately. Thomas Lloyd's discovered that an alpha particle was an atomic nucleus of the helium (helium 4) with Ernest Rutherford in 1907. In addition, Dutch produced liquid helium for the first time in 1908 by lowering the temperature to 0.9K. He receives Nobel prize by this great achievement in 1913. In addition, I succeeded in the Willem Hendrick caisson which was a pupil of making solid helium for the first time in 1926. Because the helium is included in only 5ml/m in the atmosphere of the earth, I get the industrial source of supply from the natural gas of North America product and the Algerian product. Helium 1 which a nucleus collapsed naturally, and a radioactive element to these gas of rocks produced - 7% are included.