How many of the following species are diamagn | vedclass

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(B) According to molecular orbital theory,species with all paired electrons in their electronic configuration are diamagnetic in nature.$He_2^{+} \rig

Vedclass · Accepted Answer

$2$

Vedclass · Answer

(B) According to molecular orbital theory,species with all paired electrons in their electronic configuration are diamagnetic in nature.$He_2^{+} \rightarrow$ Total $3$ electrons,configuration $\sigma 1s^2, \sigma^* 1s^1$. It contains one unpaired electron and is paramagnetic.$H_2 \rightarrow$ Total $2$ electrons,configuration $\sigma 1s^2$. All electrons are paired,hence it is diamagnetic.$H_2^{+} \rightarrow$ Total $1$ electron,configuration $\sigma 1s^1$. It contains one unpaired electron and is paramagnetic.$H_2^{-} \rightarrow$ Total $3$ electrons,configuration $\sigma 1s^2, \sigma^* 1s^1$. It contains one unpaired electron and is paramagnetic.$He \rightarrow$ Total $2$ electrons,configuration $\sigma 1s^2$. All electrons are paired,hence it is diamagnetic.Therefore,$H_2$ and $He$ are diamagnetic. The total count is $2$.

How many of the following species are diamagnetic? $He_2^{+}, H_2, H_2^{+}, H_2^{-}, He$

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