In which of the following pairs of molecules/ | vedclass

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Question

Species having zero or negative bond order do not exist.

$\mathrm{H}_{2}^{2+}(1+1-2=0)=\sigma 1 \mathrm{s}^{0}$

Bond order $=0$

$\mathrm{He}_

Vedclass · Accepted Answer

$H_{2}^{+2}, He_2$

Vedclass · Answer

Species having zero or negative bond order do not exist.

$\mathrm{H}_{2}^{2+}(1+1-2=0)=\sigma 1 \mathrm{s}^{0}$

Bond order $=0$

$\mathrm{He}_{2}(2+2=4)=\sigma 1 \mathrm{s}^{2},{ }^{\star} \mathrm{fs}^{2}$

Bond order $=\frac{N_{0}-N_{a}}{2}=\frac{2-2}{2}=0$

$\mathrm{So}, \mathrm{both} \mathrm{H}_{2}^{2+}$ and $\mathrm{He}_{2}$ do not exist.

In which of the following pairs of molecules/ions, both the species are not likely to exist?

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