1. The Ionic bond exists between atoms that __________________ electrons.

2. Donate and Accept

3. The covalent bond is formed because of an attraction between __________________________.

4. The negative valence electrons of one atom and the positive nucleus of another atom.

5. A resonance structure is __________.

6. Another possible Lewis Structure.

7. ______________ can only form one bond EVER.

8. Hydrogen

9. Which bond is more polar, CO or CF? Explain how you know.

10. CF, it has a higher electronegativity difference.

11. Which bond is predicted to be stronger, CO or CF? Explain.

12. CF, because of the higher electronegativity difference.

13. Polar molecules can have nonpolar bonds. True or False?

14. Usually false (as far as you’re concerned.)

15. The shape of H 2 O is ________.

16. Bent

17. How many total valence electrons does CN - have?

18. 4+5+1 = 10

19. Label the partial positive and partial negative dipoles on the Si—S bond.

20. Si-S

21. What is the shape of PH 3 ?

22. Trigonal pyramidal

23. Potential energy is the _________ when a bond is formed and the atoms are stable.

24. Potential energy is the LOWEST when a bond is formed and the atoms are stable.

25. The bond energy is ______ when the bond length is ______.

26. The bond energy is LARGER when the bond length is SMALLER. OR The bond energy is LESS when the bond length is GREATER.

27. Explain why CO 2 is either a polar or nonpolar molecule.

28. Nonpolar. Even though the bonds are each polar covalent, the oxygen are equally spaced around carbon. This means the electrons are equally distributed throughout the molecule and there is no dipole.