 When xenon atoms are at their ground energy state , they repel each other and will not form a bond . When xenon atoms becomes energized , however , they can form an excimer ( excited dimer ) until the electrons return to the ground state . This entity is formed because the xenon atom tends to fill its outermost electronic shell , and can briefly do this by adding an electron from a neighboring xenon atom . The typical lifetime of a xenon excimer is 1 – 5 ns , and the decay releases photons with wavelengths of about 150 and 173 nm . Xenon can also form excimers with other elements , such as the halogens bromine , chlorine and fluorine . 
 When xenon atoms <a href='drop_aux' title='1'><mark>are</mark></a>at their ground energy state , they repel each other and will not form <a href='None' title='2'><mark>a</mark></a><a href='negative_concord' title='3'><mark>bond</mark></a> . When xenon atoms <a href='uninflect' title='4'><mark>becomes</mark></a> energized , however , they can form an excimer ( excited dimer ) until the electrons return to the ground state . This entity is formed because the xenon atom <a href='uninflect' title='5'><mark>tends</mark></a> to fill its outermost electronic shell , and can briefly do this by adding an electron from a neighboring xenon atom . The typical lifetime of a xenon excimer <a href='drop_aux' title='6'><mark>is</mark></a>1 – 5 ns , and the decay <a href='uninflect' title='7'><mark>releases</mark></a> photons with wavelengths of about 150 and 173 nm . Xenon can also form excimers with other elements , such as the halogens bromine , chlorine and fluorine . 
When xenon atoms at their ground energy state , they repel each other and gon not form no bond . When xenon atoms become energized , however , they can form an excimer ( excited dimer ) untill da electrons return to the ground state . dis entity is formed because the xenon atom tend to fill its outermost electronic shell , and can briefly do tdisby adding an electron from a neighboring xenon atom . The typical lifetime of a xenon excimer 1 – 5 ns , and the decay release photons with wavelengths of about 150 and 173 nm . Xenon can also form excimers with other elements , such as the halogens bromine , chlorine and fluorine .