H2O > H2 > He
Hydrogen is dangerous than Helium because Hydrogen is a stronger gas than Helium.
Helium will not burn. Hydrogen burns in air to form H2O (water) Thus in circumstances where a lite gas is required (e.g. in a balloon) it is safer to use Helium. see http://www.unmuseum.org/hindenburg.htm
Hydrogen, helium and oxygen are gases. Gravity is a physical property of any substance.
Argon, Neon, Chlorine, Methane, Oxygen, Hydrogen. There are plenty of others.
The most abundant elements in the universe, in order from most to least abundant, are Hydrogen, Helium, Oxygen, Carbon, and Nitrogen. Therefore, the correct list would start with Hydrogen, followed by Helium (not listed), then Oxygen, Carbon, and finally Nitrogen. The first option you provided, "Hydrogen Oxygen Nitrogen Carbon," is almost correct but is missing Helium and has an incorrect order for Nitrogen and Carbon.
Hydrogen an react with oxygen to form water and not helium
Hydrogen is dangerous than Helium because Hydrogen is a stronger gas than Helium.
hydrogen helium oxygen nitrogen phosphorus aluminium nickel calcium barium magnesium oxygen sulphur helium neon tin mercury
hydrogen, helium, oxygen.
Oxygen, Hydrogen and Helium.
Helium, oxygen, and hydrogen.
Hydrogen, Helium, Oxygen.
Helium will not burn. Hydrogen burns in air to form H2O (water) Thus in circumstances where a lite gas is required (e.g. in a balloon) it is safer to use Helium. see http://www.unmuseum.org/hindenburg.htm
hydrogen is the lightest element
89% molecular hydrogen,and 11% helium carbon monoxide
At room temperature: Chlorine: gas Helium: gas Hydrogen: gas Oxygen: gas
No. It is composed mainly of hydrogen and helium. It is about 1% oxygen.