chem 1145 exam 4
) Construct a molecular orbital diagram for a Li 2 molecule. According to molecular orbital theory, the σ 1s orbital is ________ and the σ 1s * orbital is ________.
) filled, filled
3) An antibonding MO ________ the corresponding bonding MO
) is always higher in energy than
1) According to molecular orbital theory, the bond order of He-He in the He 2 molecule is
A) 0
7) How many hybrid orbitals are formed upon the mixing of three atomic orbitals
A) three
) Of the following, only ________ has sp 2 hybridization of the central atom
B) BF 3
10) The electron-domain geometry of a boron-centered compound BH 3 is trigonal planar. The hybridization of the central boron atom is ________.
B) sp 2
9) The more effectively two atomic orbitals overlap, ________.
B) the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO
8) How many unhybridized p atomic orbital(s) are found in an sp-hybridized carbon atom
C) 2
6) Mixing one s atomic orbital and one p atomic orbital gives rise to
D) two sp hybrid orbitals
2) Which of the following molecules would be expected to be attracted to a magnetic field
E) O 2 only