Which of the following statements concerning molecular orbital (MO)bond theory is/are CORRECT?
1)MO theory can describe molecular bonding in excited states.
2)Molecular orbitals are obtained from the combination of atomic orbitals.
3)MO theory predicts that electrons are delocalized over the molecule through molecular orbitals.
A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1,2,and 3

Question

Quizplus · Accepted Answer

1) MO theory can describe molecular bonding in excited states. This is true as MO theory takes into account the total wave function of the molecule by combining atomic orbitals, and can therefore provide information on bonding in both ground and excited states.

2) Molecular orbitals are obtained from the combination of atomic orbitals. This is also true as MO theory is based on the idea that molecular orbitals are formed from a linear combination of atomic orbitals.

3) MO theory predicts that electrons are delocalized over the molecule through molecular orbitals. This statement is also correct as MO theory describes bonding as electron density being spread out over the molecule, rather than localized between two atoms as in valence bond theory.

Which of the Following Statements Concerning Molecular Orbital (MO)bond Theory