11. Draw the Lewis structure for including any valid resonance structures. Which of the following statements is TRUE?
(A) The nitrite ion contains one N-O single bond and one N=O double bond.
(B) The nitrite ion contains two N-O bonds that are equivalent to 1.5 bonds.
(C) The nitrite ion contains two N=Odouble bonds.
(D) The nitrite ion contains two N-O single bonds.
(E) None of the above are true.

7. Which of the following statement is TRUE? (A) We can sometimes know the exact location and speed of an electron at the same time. (B) All orbitals in a given atom are roughly the same size. (C) Since electrons have mass, we must always consider them to have particle properties and never wavelike properties. (D) Atoms are roughly spherical because when all of the different shaped orbitals are overlapped, they take on a spherical shape. (E) All of the above are true.

8. Choose the valence orbital diagram that represents the Si. (A)(B) (C)(D) (E)

9. Predict the charge for the most stable ion of nitrogen(A) -3(B)-2 (C) 1 (D) 0 (E) +3

複選題10. Choose the compound below that should have the highest melting point according to the ionic bonding model. (A) Srl2 (B) MgF2 (C) CaCl2 (D) SrF2 (E) SrBr2

12. Place the following in order of decreasing X-A-X bond angle, where A represents the central atom and X represents the outer atoms in each molecule. (A) (B) (C) (D) (E)

13. Draw the Lewis structure for . What is the hybridization on the Br atom? (A) sp3d2 (B) sp3d (C) sp3 (D) sp2 (E) sp

14. Using the VSEPR model, the molecular geometry of the central atom in SO2 is ________ (A) linear (B) trigonal planar (C) tetrahedral (D) bent (E) trigonal pyramidal

複選題15. Place the following substances in order of increasing vapor pressure at a given temperature.  NF3 NH3 BCl3 (A) NH3＜NF3＜BCl3 (B) NF3＜NH3＜BCl3 (C) BCl3＜NF3＜NH3 (D) NH3＜BCl3＜NF3 (E) BCl3＜NH3＜NF3

16. Which of the following compounds exhibits only dispersion and dipole-dipole intermolecular interactions? (A) H2 (B) HI (C) CO2 (D) CH3NH2 (E) CH3OH

17. Which of the following statements is TRUE? (A) The solubility of a solid is not dependent on either temperature or pressure. (B) The solubility of a solid is highly dependent on pressure. (C) The solubility of a solid is highly dependent on both pressure and temperature. (D) The solubility of a solid is highly dependent on temperature. (E) None of the above.