Stability of the species Li_(2), Li_(2)^(-) and Li_(2)^(+) increases in the order of :

Stability of the species Li_(2), Li_(2)^(-) and Li_(2)^(+) increases i

1.	Stability of the species Li_(2), Li_(2)^(-) and Li_(2)^(+) increases in the order of :
Answer» `Li_(2) lt Li_(2) lt Li_(2)^(+)` `Li_(2) lt Li_(2)^(+) lt Li_(2)^(-)` `Li_(2) lt Li_(2)^(+) lt Li_(2)` `Li_(2) lt Li_(2)^(-) lt Li_(2)^(+)` Solution :`Li_(2) sigma (1S)^(2) sigma^() (1s)^(2) sigma (2s)^(2)` , BOND ORDER ` = (1)/(2) (4-2) = 1 ` `Li_(2) ^(+) sigma (1s)^(2) sigma^() (1s)^(2) sigma (2s)^(1)` , Bond order`= (1)/(2) (3-2) = (1)/(2)` `Li_(2)^(-) sigma (1s)^(2) sigma^(**) (1s)^(2) sigma (2s)^(2)(2s)^(1) `, Bond order = `(1)/(2) (4-3) = (1)/(2)` `LI_(2)^(-)` is less STABLE than ` Li_(2)^(+)` because ` Li_(2)^(-)` has more number of electrons in the antibonding molecular orbitals . Otherwisegreater the bond order , greater is the stability . HENCE , the correct order is `Li_(2)^(-) lt Li_(2)^(+) lt Li_(2) ` .