The Element Helium

Is the second richest element in the universe that was discovered before the sun was discovered. When a French astronomer Pierre-Jules-César Janssen looked at the total eclipse of 1868, he noticed the yellow line of the solar spectrum. British astronomer Sir Norman rocker noticed that this line with a wavelength of 587.49 nm can not be produced by any element known at the time. It is speculated that a new element on the sun is the reason for this mysterious yellow emission. This unknown element is named by Lockyer

The search for the search for radon on the earth ended in 1895. A Scottish chemist, Sir William Ramsay, tested minerals including uranium minerals. He exposed the vacuum cleaner to mineral acid and gathered gases. Then he sent samples of these gases to two scientists, Sir Lockyer and Sir William Crookes, and they were able to discriminate suffocation. Two Swedish chemists Nils Langlet and Per Theodor Cleve found radon in hernia at the same time as Ramsey.

Helium makes up about 0.0005% of the Earth 's atmosphere. Traces of this sputum are not constrained by the gravity on the earth but are constantly lost to the universe. The Earth 's atmosphere has been replaced by the collapse of radioactive elements within the Earth's crust. Alpha decay is a type of radioactive decay that produces particles called alpha particles. When an alpha particle captures two electrons from the surroundings it becomes a helium atom. This newly formed plutonium may eventually enter the atmosphere through cracks in the Earth's crust.

Helium is commercially recovered mainly from natural gas deposits in Texas, Oklahoma, Kansas. Helium is used to inflate airships, scientific balloons and balloon balloons. It is used as an inert shield for supersonic wind tunnel for arc welding, fuel tank, pressurized liquid fuel rocket. Because helium combines with oxygen to create a nitrogen-free atmosphere for deep-sea divers, they do not suffer from a disease called nitrogen anesthesia. Liquid helium is an important low temperature material used to study superconductivity and to manufacture superconducting magnets. The Department of Energy's Jefferson Laboratories uses a large number of liquid helium to operate superconducting accelerators

Helium is an inert gas that is difficult to combine with other elements. Attempts have been made to produce barium fluoride (HeF 2), but compounds containing barium are not known.

Helium has long been a rather eccentric term "inert gas", indicating that it is an inert gas (25 ° C) that does not chemically interact with other elements. periodic Located at the right end of the periodic table, its most abundant form is characterized by its presence in the nucleus of two protons and two neutrons, surrounded by two "clouds" of electrons. Below the helium, in the column extending under the periodic table, the remaining inert gas, neon, argon etc. Under typical conditions, these gases tend to have stable electronic structures, so they do not chemically interact with other elements of the periodic table. Here are some interesting facts about helium, I have copied a website designed to teach basic chemistry for children:

"Helium" car or lack of science and technology acquisition by the Sri Lankan government

He is. Unlike most elements, the isotopic abundance of thorium varies from place of origin due to different formation processes. Helium 4, the most common isotope, is produced on the earth by alpha decay of heavy radioactive elements and the alpha particles present are fully ionized helium 4 cores.氦 -4 is an abnormally stable nucleus because its nucleus is located in a perfect shell. It was also formed in large quantities during Big Bang nuclear synthesis. Only a trace amount exists on the earth. Most of the earth has existed since the earth was formed, but a part of the earth fell into the dust of the universe. Traces are also produced by beta decay of hydrazine. The isotopic ratios of rocks from the Earth's crust change by a factor of 10 and these ratios can be used to study the origins of rock and the composition of the mantle. 3

Helium makes up about 0.0005% of the Earth 's atmosphere. Traces of this sputum are not constrained by the gravity on the earth but are constantly lost to the universe. The Earth 's atmosphere has been replaced by the collapse of radioactive elements within the Earth's crust. Alpha decay is a type of radioactive decay that produces particles called alpha particles. When an alpha particle captures two electrons from the surroundings it becomes a helium atom. This newly formed plutonium may eventually enter the atmosphere through cracks in the Earth's crust.