CHAPTER 6

IONIC BONDS

We will spend about 1 1/2 lecture days covering just the first five sections of this chapter (just 10 pages). In this chapter we will learn more about ionic bonding. We will learn more about shielding, effective nuclear charge, and some more periodic trends including ion size, ionization energy, and electron affinity. I will summarize the main ideas (qualitative, not quantitative) in Section 6, but you do not need to read that section.

Chapter Learning Goals for Students

Section 6.1 ❏ Predict the ground-state electron configuration for ions.

Section 6.2 ❏ Given a set of atoms and ions, determine which atom or ion is expected to have the largest radius.

Section 6.3 ❏ For any two elements, predict which has the higher first ionization energy.

Section 6.4 ❏ For any two elements, predict which has the higher second, third, fourth, etc. ionization energy.

Section 6.5 ❏ For any two elements, predict which has the more favorable (more negative) electron affinity.

❏ Do Problems 1 – 10, 22 – 28 even and 30 – 56 even.

Section 6.6 ❏ Understand the “octet rule” for electron configurations ❏ Do Problems 12 and 12

Section 6.7 ❏ Read Section 6.7 and underderstand the definition of “lattice energy.” We will return to the calculations after we have had Hess’s law in Chapter 8.

Section 6.8 ❏ Understand the role of ionic charge on lattice energy. ❏ Do Problems 14 and 15, 58.