Hydrogen is a tasteless, odourless, colourless gas and is one of the most important chemical elements. The hydrogen atom is simple and the smallest atom. Hydrogen consists of 1 proton, which has a positive charge, and 1 electron, which has a negative charge as well. Hydrogen has a chemical symbol H. Its atomic number is 1. Its atomic weight is 1.0079. The term hydrogen comes from two Greek words meaning water-former. Hydrogen gas and oxygen gas combine to form …showed first 75 words of 407 total…

…showed last 75 words of 407 total…leaving copper free. Preparation: Hydrogen is prepared in the laboratory when acids are reacted with metals such as Zinc. It can also be prepared by electrolysis of water. Uses: It is used to manufacture ammonia and methyl alcohol. It is used in making edible fats by the process called hydrogenation. It can be used in making petrol by the process called hydrogenation. It is used in high temperature flames for cutting, meting and welding metals.