(B) The species $Be_2$ does not exist under normal conditions.The electronic configuration of $Be_2$ ($Z=4$,total $8$ electrons) is: $\sigma 1s^2 \sig

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(B) The species $Be_2$ does not exist under normal conditions.The electronic configuration of $Be_2$ ($Z=4$,total $8$ electrons) is: $\sigma 1s^2 \sigma^* 1s^2 \sigma 2s^2 \sigma^* 2s^2$.The bond order is calculated as: $\text{Bond order} = \frac{N_b - N_a}{2} = \frac{4 - 4}{2} = 0$.Since the bond order is $0$,the molecule is unstable and does not exist.

Class 11 Chemistry Chemical Bonding and Molecular Structure Molecular orbital theory

Medium

Which one of the following species does not exist under normal conditions?

AIPMT 2010 All AIPMT

A
$Be_2^+$
B
$Be_2$
C
$B_2$
D
$Li_2$

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Class 11

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Chemical Bonding and Molecular Structure

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Molecular orbital theory

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Which one of the following species does not exist under normal conditions?

Similar Questions

If other factors remain constant,which of the following bond orders corresponds to the shortest bond length?

When $O_{2}$ is converted into $O_{2}^{+}$,what happens to its paramagnetic character and bond order?

The correct order of bond dissociation energy among $N_2, O_2, O_2^-$ is shown in which of the following arrangements?

What is the magnetic nature of dioxygen $(O_2)$?

Stability of the species $Li_2$,$Li_2^-$ and $Li_2^+$ increases in the order of $:-$

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