In which of the following pairs of molecules/ | vedclass

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(C) According to Molecular Orbital Theory,species with a bond order of $0$ or less do not exist.For $H_{2}^{2+}$: Total electrons $= 1 + 1 - 2 = 0$. E

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

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(C) According to Molecular Orbital Theory,species with a bond order of $0$ or less do not exist.For $H_{2}^{2+}$: Total electrons $= 1 + 1 - 2 = 0$. Electronic configuration $= \sigma 1s^{0}$. Bond order $= 0$.For $He_{2}$: Total electrons $= 2 + 2 = 4$. Electronic configuration $= \sigma 1s^{2}, \sigma^* 1s^{2}$. Bond order $= \frac{2 - 2}{2} = 0$.Since both $H_{2}^{2+}$ and $He_{2}$ have a bond order of $0$,they are not likely to exist.

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

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