Where on the blank outline of the periodic table do the following elements appear?(a) Main groups(b) Halogens(c) Alkali metals(d) Noble gases(e) Alkaline earths(f) Group 3A elements(g) Lanthanides

6.27

Which of the following drawings is more likely to represent an ionic compound, and which a covalent compound?

6.28

Circle the approximate part or parts of the periodic table where the following elements appear:

(a) Elements with the smallest values of Ei1

(b) Elements with the largest atomic radii(c) Elements with the most negative values of Eea

6.29

Where on the periodic table would you find the element that has an ion with each of the following electron configurations? Identify each ion.

(a) 3 ion: 1s2 2s2 2p6

(b) 3 ion: [Ar] 3d3

(c) 2 ion: [Kr] 5s2 4d10

(d) 1 ion: [Kr] 4d10

6.30

Which of the following spheres is likely to represent a metal, and which a nonmetal? Which sphere in the products represents a cation, and which an anion?

6.31

Each of the pictures (a)–(d) represents one of the following substances at 25°C: sodium, chlorine, iodine, sodium chloride. Which picture corresponds to which substance?

6.32

Which of the following alkali metal halides has the largest lattice energy, and which has the smallest lattice energy? Explain.

6.34

Three binary compounds are represented on the following drawing—red with red, blue with blue, and green with green. Give a likely formula for each compound, and assign oxidation numbers in each.

6.34

Given the following values for the formation of LiCl from its elements, draw a Born–Haber cycle similar to that shown in Figure 6.8.

Eea for Cl 348.6 kJ/molHeat of sublimation for Li 159.4 kJ/molEi1 for Li 520 kJ/molBond dissociation energy for Cl2 348.6 kJ/molLattice energy for LiCl 853 kJ/mol

6.35