Hydrogen

The hydrogen is the lightest element of the nature, as well as the most abundant in the universe, totalizing more than 70 %.It is in the young stars, in interstellar dust and in the enormous clouds of gas suspended in the space, but most of it is forming diverse chemical compounds. It hass very low solubility in liquids, but a high solubility in metals. Hydrogen is a colorless, odourless, insipid gas and it is not poisonous. Hydrogen burns itself in the air forming an almost invisible pale blue flame. Hydrogen is the lightest of the gases known because of its low specific gravity in relation to the air. For this reason, his manipulation needs from special care to avoid accidents. Hydrogen is particularly inclined to escapes due to his fall stickiness and to his low molecular weight. It is a fuel with a high energy, which provides 28.6696 Kcal for every gram, opposite to 11.953 Kcal/gr of the natural gas, 10.780 Kcal/gr of the gasoline, 10.932Kcal/gr of the butane and 10.0792 Kcal/gr of the propane.