Helium Essay Research Paper Helium by I
Helium Essay, Research Paper
by I ain & # 8217 ; t stating you! ! !
Pierre Janssen discovered He in the Sun in 1868. Janssen
originally thought it was Na, but Joseph Norman Lockyer noticed that it
didn & # 8217 ; t correspond to the D1 and D2 lines of Na. He named it the & # 8220 ; D3 & # 8243 ;
line. Lockyer said that the component D3 was unknown on Earth. He and
Edward Franklin concluded on the name Helios after the Greek God of the
Sun. Helium is found everyplace in infinite. All natural gases have at least a
small spot He in them. Sir William Ramsey foremost discovered Helium on Earth by in uranium mineral clevite in the twelvemonth 1895. When he heated the uranium mineral clevite, he noticed a bright xanthous visible radiation in its spectrum. It looked the same as the D3 line that was found in the Sun. It was concluded that this was the element He. In 1903, Ramsey besides discovered that He is a merchandise of the self-generated decomposition of radioactive substances.
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In 1907 Rutheford and Royds demonstrated that all alpha atoms are helium karyon.
The largest compounds of He are found in the universe. About 23 per centum of the mass of the existence is helium. This makes it the 2nd most common component behind H. Helium is largely concentrated in stars where it combines with H to make atomic merger. Helium is created in stars by atomic merger of H. Helium is found on the Earth every bit good, but it is non every bit abundant as it is in infinite. Merely 0.0005 per centum of He occurs in the Earth & # 8217 ; s Atmosphere, as opposed to 23 per centum in infinite. On Earth, He is largely found as a constituent in natural gases. This means that they helium is a natural gas. Helium is largely found in the United States, Especially in Texas, New Mexico, Kansas, Oklahoma, Arizona and Utah. Helium has besides been found in smaller measures in Canada, South Africa, and the Sahara Desert. Helium gas is extracted from natural gases by liquefying the gases at low temperatures and high force per unit areas. With minute
T gases, this produces 98.2 per centum pure He. However, with activated charchol, it produces 99.995 per centum pure He.
Helium, with the symbol He, has an atomic figure of 2, and an atomic
mass of 2 AMU & # 8217 ; s. It has no colour. Helium gas is unreactive, colorless, and
odorless. Helium has an highly low runing point ( -452? F ) , and boiling
point of close to absolute nothing. Helium can non be solidified by take downing
temperature, but can be by increasing force per unit area to 25 ambiances. This
allows for He to be used as a coolant in many low-pressure devices, such
as projectile engines. It is used to chill liquid H fuel in these engines.
Due to helium & # 8217 ; s ability to map at highly low temperatures,
He is the ideal substance to utilize for cryogenic research. When decently cooled, the temperature of He can travel down to a few Micro-Kelvin & # 8217 ; s. Originally for
balloons and Colonel Blimps ( dirigibles ) , H was the primary substance used. Hydrogen, with an atomic mass of 1, is the lightest atom, and therefore will give you the best public presentation for dirigibles. However, because H merely has 1 negatron in its outermost energy degree, it is unstable, and tends to spontaneously burn when assorted with O. One of the most obvious presentations of this was the clang of the German dirigible, the Hindenburg ( below left ) in 1937 As you can see, the consequences were non reasonably. In more modern times, Helium is used because it is a stable component ( below right ) .
Because of it & # 8217 ; s low-cost monetary value, and broad array of belongingss and utilizations, He is used all over the universe. Everywhere from birthday parties to progress cryogen research installations, you are certain to see an application of it. One belongings that makes He different than any other component, is its ability to make highly cold temperatures. Helium is the ideal substance to utilize for many different things, and fortunately because of its great copiousness in outer infinite, there will ne’er be a deficit of He.