aren't they difficult to manage since they aren't solid
2007-09-12 02:02:10 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Helium : is obtained from helium wells. Helium is formed on earth by the radioactive decay of metals like Uranium and Thorium. This is known as nucleur fission. In stars, helium is formed from Hydrogen by a process known as nucleur fusion.
Hydrogen: is obtained by the electrolysis of water. An electric current is passed through water and splits it into Oxygen gas and Hydrogen gas. Hydrogen is the most abundant substance in the universe and is the first form of matter that existed.
Nitrogen: is present in the atmosphere, which is three quarters nitrogen and about 20% Oxygen. Air is compressed until it liquifies. Due to the difference in the boiling points of Nitrogen and Oxygen, the two gasses can be separated by a distillation process which is taking place at over 100 degrees below zero.
All elemental gasses (and all matter) were created from Hydrogen in stars by the process of nucleur fusion. Hydrogen is fused into Helium, Helium into Carbon and finally carbon into Iron. Ordinary nucleur fusion can not fuse anything denser than iron. However, some stars explode as supernova. The energy released is sufficient to fuse heavier elements like Gold, Lead and Uranium. Heavy gasses like Krypton, Xenon and Radon are also created by supernova explosions.
2007-09-12 02:16:04 · answer #1 · answered by Roger S 7 · 0⤊ 0⤋
Actually, I would think that they are easier to isolate than some solid elements. Take a piece of limestone, for example. Obtaining calcium from that is no easier than isolating oxygen in the air.
Gases are often obtained from reactions with liquids/solids. Oxygen and hydrogen, for example, is easily gathered by electrolysis of water (H2O) - in fact it was first described remarkably early (1777) accidentally when Lavoisier was toying with acids. Compare to calcium, which took until 1808 and required a concentrated effort.
2007-09-12 02:14:26 · answer #2 · answered by John H 4 · 0⤊ 0⤋
Nitrogen is present in the atmosphere. Air is predominantly N2.
Helium is obtained by fractional distillation of natural gas which contains up to 7% helium.
Hydrogen gas is produced by electrolysis of water. H2 is highly reactive so it needs to be isolated to maintain it in elemental form.
2007-09-12 02:07:22 · answer #3 · answered by gebobs 6 · 1⤊ 0⤋