A) \[H_{2}^{-}\]
B) \[H_{2}^{+}\]
C) \[{{H}_{2}}\]
D) \[He_{2}^{+}\]
Correct Answer: C
Solution :
A species is said to be diamagnetic if all the electrons present in it are paired.| Species | Electron | MO Electronic Configuration | Magnetic behavior |
| \[H_{2}^{-}\] | 3 | \[\sigma 1{{s}^{2}}\overset{*}{\mathop{\sigma }}\,1{{s}^{1}}\] | Paramagnetic |
| \[H_{2}^{+}\] | 1 | \[\sigma 1{{s}^{1}}\] | Paramagnetic |
| \[{{H}_{2}}\] | 2 | \[\sigma 1{{s}^{2}}\] | Diamagnetic |
| \[He_{2}^{+}\] | 3 | \[\sigma 1{{s}^{2}}\overset{*}{\mathop{\sigma }}\,1{{s}^{1}}\] | Paramagnetic |
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