Unit 7
Unit 8 Study Guide

1. Which of the following statements is incorrect? A) Ionic bonding results from the transfer of electrons from one atom to another. B) Dipole moments result from the unequal distribution of electrons in a molecule. C) The electrons in a polar bond are found nearer to the more electronegative element. D) A molecule with very polar bonds can be nonpolar. E) Linear molecules cannot have a net dipole moment.

2. Atoms having greatly differing electronegativities are expected to form: A) no bonds B) polar covalent bonds C) nonpolar covalent bonds D) ionic bonds E) covalent bonds

3. Choose the compound with the most ionic bond. A) LiCl B) KF C) NaCl D) LiF E) KCl

4. Atoms with very similar electronegativity values are expected to form A) no bonds. B) covalent bonds. C) triple bonds. D) ionic bonds. E) none of these

5. Which of the following bonds is least polar? A) C—O B) H—C C) S—Cl D) Br—Br E) They are all nonpolar.

6. For the elements Rb, F, and O, the order of increasing electronegativity is: A) Rb < F < O B) Rb < O < F C) O < F < Rb D) F < Rb < O E) None of these

7. For the elements Cs, F, and Cl, the order of increasing electronegativity is: A) F < Cl < Cs B) Cs < Cl < F C) Cl < Cs < F D) F < Cs < Cl E) None of these

8. In the gaseous phase, which of the following diatomic molecules would be the most polar? A) CsF B) CsCl C) NaCl D) NaF E) LiF

9. Based on electronegativities, which of the following would you expect to be most ionic? A) N2 B) CaF2 C) CO2 D) CH4 E) CF4

10. In which case is the bond