Noble

Name:
Noble
Detailed information:
In chemical terminology, this term describes an element that either is completely unreactive or reacts only to a limited extent with other elements. Six noble gases constitute group VIIIA in the periodic table that is variously called the zero group (as the first three of its members have a valence of 0), the inert gas group, and the noble gas group. The last is preferable, as three of the gases, though unreactive, are not inert. The gases of this group are helium, neon, argon, krypton, xenon, and radon. The noble metals are generally considered to be gold, silver, platinum, palladium, iridium, rhenium, mercury, ruthenium, and osmium. The term has no reference to their commercial value.See Inert.