Molecular Orbitals Multiple Choice Test
Click in the appropriate box for each question, then click "Done" at the bottom. 10 marks for each correct answer. Hints cost 5 marks each.
1. Additive combinations of atomic orbitals give:
antibonding molecular orbitals hybrid orbitals other atomic orbitals bonding molecular orbitals resonant structures
2. An electron can cross a node in an atomic or molecular orbital because:
The electron momentarily disappears The node momentarily disappears The electron has wave-like properties The electron moves at the speed of light None of the above
3. The C2 molecule has 6 bonding and 2 antibonding electrons. The bond order of this species is:
-2 -1 0 1 2
4. A molecular orbital diagram for the O2 molecule is shown below. The bond order for this species is:
0 0.5 1.0 1.5 2.0
5. Referring to the diagram in question 4, which of the following statements is true? The O2- ion is not paramagnetic The O2+ ion is not paramagnetic The O2 molecule is not paramagnetic The O2-2 ion is not paramagnetic The O2+2 ion is paramagnetic
6. Referring to the diagram in question 4, what would happen to the O2 molecule upon ionization to O2+? The bond length will increase and the bond energy will increase The bond length will increase and the bond energy will decrease The bond length will decrease and the bond energy will decrease The bond length will decrease and the bond energy will increase Nothing will happen
7. A molecular orbital diagram for the N2 molecule is shown below. What would happen to the molecule upon ionization to N2+? The bond length will increase and the bond energy will increase The bond length will increase and the bond energy will decrease The bond length will decrease and the bond energy will decrease The bond length will decrease and the bond energy will increase Nothing will happen
8. Referring to the diagram in question 7, what kind of bond is present in the N2 molecule? A single bond A double bond A triple bond A "one and a half" bond A hydrogen bond
9. Referring to the diagram in question 7, the N2 molecule is: Paramagnetic Diamagnetic Supermagnetic Ferromagnetic Not magnetic
10. A molecular orbital is shown below. Note the two nuclei (small yellow dots). Which of the following is correct? Four electrons can occupy this orbital Eight electrons can occupy this orbital This is a bonding orbital This is a sigma molecular orbital None of the above are correct