Which of the following compounds contains the strongest ionic bonds? KClO4 LICI CsCl KClO3 LiClO4

3-122 Some of the following structural formulas are incorrect because they contain one or more atoms that do not have their normal number of covalent bonds. Which structural formulas are incorrect, and which atom or atoms in each have the incorrect number of bonds?

Draw Lewis structures to illustrate the covalent bonding in the following diatomic molecules. a. Br2 b. HBr c. BrF d. IBr

A polyatomic ion is composed of C, N, and an unknown element X. The skeletal Lewis structure of this polyatomic ion is [XCN]. The ion X2 has an electron configuration of [Ar]4s23d104p6. What is element X? Knowing the identity of X, complete the Lewis structure of the polyatomic ion, including all important resonance structures.

Four hypothetical elements, A, B, C, and D, have electronegativities A = 3.4, B = 3.1, C = 2.5, end D = 1.7. These elements form the compounds CB, DC, DA, and BA. Arrange the compounds in order of a. Increasing ionic bond character b. Decreasing covalent bond character

Four hypothetical elements, A, B, C, and D, have electronegativities A = 3.8, B = 3.3, C = 2.8, and D = 1.3. These elements form the compounds BA, DA, DB, and CA. Arrange the compounds in order of a. Increasing ionic bond character b. Decreasing covalent bond character

How many electron dots should appear in the Lewis structures for each of the following polyatomic ions? a. ClO b. ClO2 c. S22 d. NH4+

Draw Lewis structures showing all valence electrons for these molecules. (a) C2H6 (b) CS2 (c) HCN

Write the Lewis symbols of the ions in each of the following ionic compounds and the Lewis symbols of the atom from which they are formed: (a) MgS (b) Al2O3 (c) GaCl3 (d) K2O (e) Li3N (f) KF

Arrange the single covalent bonds within each set in order of increasing polarity. (a) CH, O H, NH (b) CH, BH, OH (c) CH, CCl, CI (d) CS, CO, CN (e) CLi, CB, CMg