sentence: Noble gases are very unreactive.
sentences_before: Xenon is a belongs to the group of the noble gases.
sentences_after: However, in 1962, chemists have found that xenon can react with fluorine under special conditions. Those special conditions are high pressure and high temperature. It is not known why xenon behaves differently under these circumstances. There are also some compounds with oxygen. The gas is not very reactive, because if fulfills the octet rule.
concept_name: noble gas
headings: Xenon
categories: Noble gases