Helium is a chemical element with the symbol He has the atomic number 2. helium in the periodic table is located within the elements of the first session and at the head of the elements of the
Helium is the second lightest element in the universe after hydrogen, as it is the second most abundant element in the universe, which constitutes 24% of the universe for the mass elements. For the abundance on the ground, the helium rare naturally, where constitutes only 5.2 ppm for the atmosphere. Several of helium isotopes but more than 99% of the helium on earth is helium-4, which consists of two protons its nucleus and two neutrons two.
There helium gas in some natural gas fields by up to 7% by volume, where is extracted from there by fractional distillation. It should be noted that the sources of helium are running out, where it is the only item that has escape velocity, meaning that when released into the atmosphere it seep into outer space. [2] [3] [4]
Helium is used in deep cooling techniques, especially for cooling the high-conductivity magnets used in magnetic resonance imaging technology devices. Also taken advantage of the characteristics of the inert gas helium as a gas used in the visor in arc welding and in the manufacture of silicon chips operations.
It costs $ 1,000 per gram. Helium 3, is a gas created when decomposed substance tritium radiation, and scientists hope to use this gas for the production of energy from the fusion process, the same process taking place in the sun, but the dilemma is that this rare gas on the ground to the point that NASA has studied the possibility of gas production on the land of the moon, where the molecules coming from the sun are clustered there.
Eighteenth Group. In standard conditions of pressure and temperature, the helium is a colorless, odorless gas, is non-toxic and has no taste. Helium belongs to the noble gases, so it is an inert gas monatomic, and because there are no idle chemical molecules him, he is always there in the atomic image. Helium and less than the boiling point of fusion compared to the rest of the chemical elements, is found most often in the gaseous state except for very special circumstances.
Helium is the second lightest element in the universe after hydrogen, as it is the second most abundant element in the universe, which constitutes 24% of the universe for the mass elements. For the abundance on the ground, the helium rare naturally, where constitutes only 5.2 ppm for the atmosphere. Several of helium isotopes but more than 99% of the helium on earth is helium-4, which consists of two protons its nucleus and two neutrons two.Helium is used in deep cooling techniques, especially for cooling the high-conductivity magnets used in magnetic resonance imaging technology devices. Also taken advantage of the characteristics of the inert gas helium as a gas used in the visor in arc welding and in the manufacture of silicon chips operations.
It costs $ 1,000 per gram. Helium 3, is a gas created when decomposed substance tritium radiation, and scientists hope to use this gas for the production of energy from the fusion process, the same process taking place in the sun, but the dilemma is that this rare gas on the ground to the point that NASA has studied the possibility of gas production on the land of the moon, where the molecules coming from the sun are clustered there.