 After Neil Bartlett 's discovery in 1962 that xenon can form chemical compounds , a large number of xenon compounds have been discovered and described . Almost all known xenon compounds contain the electronegative atoms fluorine or oxygen . 
 After Neil Bartlett <a href='null_genetive' title='1'><mark>'s</mark></a>discovery in 1962 that xenon can form chemical compounds , a large number of xenon compounds <a href='been_done' title='2'><mark>have</mark></a> been discovered and described . Almost all known xenon compounds contain the electronegative atoms fluorine or oxygen . 
After Neil Bartlett  discovery in 1962 that xenon can form chemical compounds , a large number of xenon compounds done been discovered and described . Almost alll known xenon compounds contain the electronegative atoms fluorine or oxygen .