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.
All noble gases are particularly unreactive because they have a full set of valence electrons, that is their outermost shell of electrons does not need any more, so they do not have reason to bond with other atoms or lose/gain electrons. THus they are considered 'noble...i guess.