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Chemical Bonding and Molecular Structure question

2010 · Q121
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Chemical Bonding and Molecular Structure question

2010 · Q121

NEETChemistryChemical Bonding and Molecular StructureMCQ+4 / −1
Which one of the following species does not exist under normal conditions?
  1. A
    Be2+
  2. B
    Be2
  3. C
    B2
  4. D
    Li2
View written solutionFree

Correct answer: B

Be2 does not exists

Be2 has an electronic configuration of :

σ1s2σ∗1s2σ2s2σ∗2s2\sigma 1{s^2}{\sigma ^*}1{s^2}\sigma 2{s^2}{\sigma ^*}2{s^2}σ1s2σ∗1s2σ2s2σ∗2s2

∴\therefore∴ Bond order = 4−42=0{{4 - 4} \over 2} = 024−4​=0

Thus, Be2 does not exists

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