The six noble gases are found in group 18 of the periodic table. These elements were considered to be inert gases until the 1960’s, because their oxidation number of 0 prevents the noble gases from forming compounds readily. The noble gases are a group of chemical elements with very similar properties: under standard conditions, they are all odorless, colorless, monatomic gases, with very low chemical reactivity. All noble gases have the maximum number of electrons possible in their outer shell, giving them little tendency to participate in chemical reactions, and it has only been possible to prepare a few hundred noble gas compounds. The melting and boiling points for each noble gas are close together, differing by less than 10 °C (18 °F).
Type and hit enter