+ ▁is ▁held ▁together ▁with ▁a ▁strength ▁of ▁ 1 4 4 5   cm − 1 ▁when ▁it ▁is ▁in ▁the ▁X ▁electronic ▁state , ▁but ▁ 1 0 1 3   cm − 1 ▁when ▁it ▁is ▁in ▁the ▁B ▁excited ▁state . ▁ ▁Metal – arg on ▁c ations ▁are ▁called ▁" arg ides ". ▁The ▁arg ide ▁ ions ▁produced ▁during ▁mass ▁spect ro sc opy ▁have ▁higher ▁intensity ▁when ▁the ▁binding ▁energy ▁of ▁the ▁ion ▁is ▁higher . ▁Trans ition ▁elements ▁have ▁higher ▁binding ▁and ▁ion ▁flux ▁intensity ▁compared ▁to ▁main ▁group ▁elements . ▁Arg ides ▁can ▁be ▁formed ▁in ▁the ▁pl asma ▁by ▁excited ▁arg on ▁atoms ▁react ing ▁with ▁another ▁element ▁atom , ▁or ▁by ▁an ▁arg on ▁atom ▁binding ▁with ▁another ▁ion : ▁Ar + ▁+ ▁M ▁→ ▁Ar M + ▁+ ▁e − ; ▁M + ▁+ ▁Ar ▁→ ▁Ar M + . ▁ ▁Dou b ly ▁charged ▁c ations , ▁called ▁sup ere lect roph iles , ▁are ▁capable ▁of ▁react ing ▁with ▁arg on . ▁I ons ▁produced ▁include ▁Ar CF ▁Ar CH , ▁Ar BF ▁and ▁Ar BF ▁containing ▁b onds ▁between ▁arg on ▁and ▁carbon ▁or ▁bor on . ▁ ▁Dou b ly ▁ion ised ▁ac et yl ene ▁H C CH 2 + ▁react s ▁in efficient ly ▁with ▁arg on ▁to ▁yield ▁H CC Ar 2 + . ▁ ▁This ▁product ▁compet es ▁with ▁the ▁formation ▁of ▁Ar + ▁and ▁arg on ium . ▁ ▁The ▁Si F