What Are The Chemical Properties Of Hydrogen Gas?


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Simon Davies Profile
Simon Davies answered
Hydrogen gas is a colourless, odourless gas. It has a melting point of -259 C and a boiling point of 252.9 C, which means that it is gaseous at room temperature and pressure.

Hydrogen is the lightest element. It is also the most abundant element in the universe. It has an atomic number of 1, its nucleus contains just one proton and it has just one electron in its shell.

It is non-metallic. In its gaseous state it is present as two atoms bonded by a covalent bond in which the electron from each atom is paired up.

The gas is extremely flammable because hydrogen gas reacts readily with oxygen from the air when ignited by a spark to form water (H2O). This reaction can be explosive.

Hydrogen is sparingly soluble in water and does not react with either water or hydrochloric or sulphuric acid.

Hydrogen gas readily reacts in the dark with fluorine gas to produce hydrogen fluoride.
Sajid Majeed Profile
Sajid Majeed answered
It is the first element in the periodic table. It is a colorless, odorless and insipid gas in normal conditions, formed by diatomic molecules, H2. The hydrogen atom is formed by a nucleus with one unit of positive charge and one electron. The atomic number of hydrogen is 1 and its atomic weight 1,00797 g/mol. It is one of the main compounds of water. It's widely spread not only in The Earth but also in the entire Universe. It has three hydrogen isotopes: protium, mass 1, found in more than 99,985% of the natural element; deuterium, mass 2, found in nature in 0.015% approximately, and tritium, mass 3, which appears in small quantities in nature. It can be artificially produced by various nuclear reactions.

At normal temperature it is a not very reactive substance, until it has been activated somehow; for instance, by an appropriate catalyser. At high temperatures Hydrogen is highly reactive this gas can be burned in internal combustion engines. Its fuel cells are being looked into as a way to provide power and research is being conducted on hydrogen as a possible major future fuel. For instance Hydrogen can be converted to and from electricity from bio-fuels, from and into natural gas and diesel fuel, theoretically with no emissions of either CO2 or toxic chemicals.

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