Multiple Choice
According to molecular orbital theory, what is the bond order of the Ne_2^{2+} ion?
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12. Molecular Shapes & Valence Bond Theory
Molecular Orbital Theory
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Using molecular orbital theory, determine the bond order for Li2+.
A
0
B
½
C
1
D
1½
E
2
Verified step by step guidance1
Identify the total number of electrons in the Li2+ ion. Lithium (Li) has an atomic number of 3, so a neutral Li2 molecule would have 6 electrons. Since Li2+ has lost one electron, it has 5 electrons.
Write the molecular orbital configuration for Li2+. The order of filling is: σ(1s), σ*(1s), σ(2s), σ*(2s). Distribute the 5 electrons in these orbitals.
Fill the molecular orbitals: 2 electrons in σ(1s), 2 electrons in σ*(1s), and 1 electron in σ(2s).
Calculate the bond order using the formula: Bond Order = (Number of electrons in bonding orbitals - Number of electrons in antibonding orbitals) / 2.
Substitute the number of electrons into the bond order formula: Bond Order = (3 - 2) / 2.
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