O₂^- $$ \to $$ 1

B₂ $$ \to $$ 1

O₂⁺ $$ \to $$ 2.5

NO⁺ $$ \to $$ 3

NO $$ \to $$ 2.5

CO $$ \to $$ 3

N₂ $$ \to $$ 3

O₂ $$ \to $$ 2

Configuration of O₂

$$\sigma 1{s^2}{\sigma ^*}1{s^2}\sigma 2{s^2}{\sigma ^*}2{s^2}\sigma 2p_z^2\pi 2p_y^2{\pi ^*}2p_x^1{\pi ^*}2p_y^1$$

Bond order = $${{No.\,of\,{e^ - }\,in\,bonding\,M.O - No.\,of\,{e^ - }\,in\,antibonding\,M.O} \over 2}$$

Bond order of O₂⁺ = $${{10 - 5} \over 2}$$ = 2.5

Bond order of O₂^- = $${{10 - 7} \over 2}$$ = 1.5

Bond order of O₂^2- = $${{10 - 8} \over 2}$$ = 1

Bond order of O₂ = $${{10 - 6} \over 2}$$ = 2

BCl₃ $$ \Rightarrow $$ sp², trigonal planar

BrCl₃ $$ \Rightarrow $$ sp³d, T-shaped

NH₃ $$ \Rightarrow $$ sp³, pyramidal

NO₃^- $$ \Rightarrow $$ sp², trigonal planar

NF₃ $$ \Rightarrow $$ sp³, pyramidal

BF₃ $$ \Rightarrow $$ sp², trigonal planar

BF₄^- $$ \Rightarrow $$ sp³, tetrahedral

NH₄^- $$ \Rightarrow $$ sp³, tetrahedral