Chapter 3 Review
3.1 Elements; and 3.2 The Periodic Table
- 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:
- uranium
- bromine
- strontium
- neon
- gold
- americium
- rhodium
- sulfur
- carbon
- potassium
Check answers: [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:
- cobalt
- europium
- iodine
- indium
- lithium
- oxygen
- cadmium
- terbium
- rhenium
- Using the periodic table, identify the lightest member of each of the following groups:
- noble gases
- alkaline earth metals
- alkali metals
- chalcogens
Check answers: [2]
- Using the periodic table, identify the heaviest member of each of the following groups:
- alkali metals
- chalcogens
- noble gases
- alkaline earth metals
- Use the periodic table to give the name and symbol for each of the following elements:
- the noble gas in the same period as germanium
- the alkaline earth metal in the same period as selenium
- the halogen in the same period as lithium
- the chalcogen in the same period as cadmium
Check answers: [3]
3.3 Compounds and Formulas
- Using the periodic table, predict whether the following chlorides are ionic or covalent: KCl, NCl3, ICl, MgCl2, PCl5, and CCl4.
Check answers: [4] - Using the periodic table, predict whether the following chlorides are ionic or covalent: SiCl4, PCl3, CaCl2, CsCl, CuCl2, and CrCl3.
- 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.
- NF3
- BaO
- (NH4)2CO3
- Sr(H2PO4)2
- IBr
- Na2O
Check answers: [5]
- 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.
- KClO4
- MgC2H3O2
- H2S
- Ag2S
- N2Cl4
- Co(NO3)2
- For each of the following pairs of ions, write the symbol for the formula of the compound they will form:
- Ca2+, S2−
- NH4+, SO42−
- Al3+, Br−
- Na+, HPO42−
- Mg2+, PO43−
Check answers:[6]
- For each of the following pairs of ions, write the symbol for the formula of the compound they will form:
- K+, O2−
- NH4+, PO43−
- Al3+, O2−
- Na+, CO32−
- 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.
- (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 ↵
- (a) He; (b) Be; (c) Li; (d) O ↵
- (a) krypton, Kr; (b) calcium, Ca; (c) fluorine, F; (d) tellurium, Te ↵
- 1. Ionic: KCl, MgCl2; Covalent: NCl3, ICl, PCl5, CCl4 ↵
- (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. ↵
- (a) CaS; (b) (NH4)2SO4; (c) AlBr3; (d) Na2HPO4; (e) Mg3(PO4)2 ↵