Power Thesaurus 1969, governess thesaurus, Power Thesaurus, viewed 2 September, 2017, <http://www.powerthesaurus.org/governess/synonyms>.
The noble gases have weak interatomic force, and consequently have very low melting and boiling points. They are all monatomic gases under standard conditions, including the elements with larger atomic masses than many normally solid elements.
The noble gases have the following properties in common: 1  They are non-metals. 2  They are very unreactive gases. 3  They are colourless.  They exist as single atoms (they are monatomic)