Chapter 3 Review

3.1 Elements; and 3.2 The Periodic Table

  1. Using the periodic table, classify each of the following elements as a metal or a nonmetal, and then further classify each as a main-group (representative) element, transition metal, or inner transition metal:
    1. uranium
    2. bromine
    3. strontium
    4. neon
    5. gold
    6. americium
    7. rhodium
    8. sulfur
    9. carbon
    10. potassium
      Check answers: [1]
  2. Using the periodic table, classify each of the following elements as a metal or a nonmetal, and then further classify each as a main-group (representative) element, transition metal, or inner transition metal:
    1. cobalt
    2. europium
    3. iodine
    4. indium
    5. lithium
    6. oxygen
    7. cadmium
    8. terbium
    9. rhenium
  3. Using the periodic table, identify the lightest member of each of the following groups:
    1. noble gases
    2. alkaline earth metals
    3. alkali metals
    4. chalcogens
      Check answers: [2]
  4. Using the periodic table, identify the heaviest member of each of the following groups:
    1. alkali metals
    2. chalcogens
    3. noble gases
    4. alkaline earth metals
  5. Use the periodic table to give the name and symbol for each of the following elements:
    1. the noble gas in the same period as germanium
    2. the alkaline earth metal in the same period as selenium
    3. the halogen in the same period as lithium
    4. the chalcogen in the same period as cadmium
      Check answers: [3]

3.3 Compounds and Formulas

  1. Using the periodic table, predict whether the following chlorides are ionic or covalent: KCl, NCl3, ICl, MgCl2, PCl5, and CCl4.
    Check answers: [4]
  2. Using the periodic table, predict whether the following chlorides are ionic or covalent: SiCl4, PCl3, CaCl2, CsCl, CuCl2, and CrCl3.
  3. For each of the following compounds, state whether it is ionic or covalent; write the number of atoms of each element in the compound and the total number of atoms present.
    1. NF3
    2. BaO
    3. (NH4)2CO3
    4. Sr(H2PO4)2
    5. IBr
    6. Na2O
      Check answers: [5]
  4. For each of the following compounds, state whether it is ionic or covalent; write the number of atoms of each element in the compound and the total number of atoms present.
    1. KClO4
    2. MgC2H3O2
    3. H2S
    4. Ag2S
    5. N2Cl4
    6. Co(NO3)2
  5. For each of the following pairs of ions, write the symbol for the formula of the compound they will form:
    1. Ca2+, S2−
    2. NH4+, SO42−
    3. Al3+, Br−
    4. Na+, HPO42−
    5. Mg2+, PO43−
      Check answers:[6]
  6. For each of the following pairs of ions, write the symbol for the formula of the compound they will form:
    1. K+, O2−
    2. NH4+, PO43−
    3. Al3+, O2−
    4. Na+, CO32−
    5. Ba2+, PO43−

Attribution & References

Except where otherwise noted, this section is adapted from “Ch. 2 Exercises” In Chemistry 2e (OpenStax) by Paul Flowers, Klaus Theopold, Richard Langley, & William R. Robinson, licensed under CC BY 4.0. / Adaptations include extracting questions for 2.5, 2.6.

  1. (a) metal, inner transition metal; (b) nonmetal, representative element; (c) metal, representative element; (d) nonmetal, representative element; (e) metal, transition metal; (f) metal, inner transition metal; (g) metal, transition metal; (h) nonmetal, representative element; (i) nonmetal, representative element; (j) metal, representative ↵
  2. (a) He; (b) Be; (c) Li; (d) O ↵
  3. (a) krypton, Kr; (b) calcium, Ca; (c) fluorine, F; (d) tellurium, Te ↵
  4. 1. Ionic: KCl, MgCl2; Covalent: NCl3, ICl, PCl5, CCl4 ↵
  5. (a) covalent; 1 Na, 3F, Total 4 atoms (b) ionic; 1 Ba, 1 O, Total 3 atoms (c) ionic; 2 N, 8H, 1 C, 3 O, Total 14 atoms (d) ionic; 1 Sr, 4 H, 2 P, 8 O, Total 15 atoms  (e) covalent; 1 I , 1 Br, Total 2 atoms (f) ionic; 2 Na, 1 O, Total 3 atoms. ↵
  6. (a) CaS; (b) (NH4)2SO4; (c) AlBr3; (d) Na2HPO4; (e) Mg3(PO4)2 ↵

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Enhanced Introductory College Chemistry Copyright © 2023 by Gregory Anderson; Caryn Fahey; Jackie MacDonald; Adrienne Richards; Samantha Sullivan Sauer; J.R. van Haarlem; and David Wegman is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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