Of the species O2, O2+ , O2-, O22- , which would have the shortest bond length ?

Of the species O2, O2+ , O2-, O22- , which would have the shortest

1.	Of the species O2, O2+ , O2-, O22- , which would have the shortest bond length ?
A.	O2-
B.	O2
C.	O2+
D.	O22-
Answer» D. O22-