 Many oxygen @-@ containing xenon compounds are toxic due to their strong oxidative properties , and explosive due to their tendency to break down into elemental xenon plus diatomic oxygen ( O2 ) , which contains much stronger chemical bonds than the xenon compounds . 
 Many oxygen @-@ containing xenon compounds <a href='drop_aux' title='1'><mark>are</mark></a>toxic due to their strong oxidative properties , and explosive due to their tendency to break down into elemental xenon plus diatomic oxygen ( O2 ) , which <a href='uninflect' title='2'><mark>contains</mark></a> much stronger chemical bonds than the xenon compounds . 
Many oxygen @-@ containing xenon compounds toxic due to their strong oxidative properties , and explosive due to their tendency to break down into elemental xenon plus diatomic oxygen ( O2 ) , which contain much stronger chemical bonds than the xenon compounds .