# 4.E: Valence Electrons and Bonding (Exercises)

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## Exercises

1: Identify whether each compound(s) is/are ionic.

1. NaI
2. Au2CO3
3. N2O
4. SiO2

Only answers (a) and (b) are ionic compounds. Both formulas begin with a metal (atom from the left side of the periodic table) ion.

2: Identify whether each compound(s) is/are covalent.

1. SiH3
2. C6H5Cl
3. KC2H3O2
4. Ca(OH)2

Only answers (a) and (b) are covalent compounds. Both formulas begin with nonmetals and/or metalloids (atoms from the right side of the table)

3: Write the formula for each ionic compound.

1. magnesium sulfite
2. aluminum nitride
3. mercury II hydroxide
4. ammonium oxide

a. MgSO3 b. AlN c) Hg(OH)2 d) (NH4)2O

4: Write the formula for each covalent compound.

1. iodine trichloride
2. disulfur dibromide
3. arsenic trioxide
4. xenon hexafluoride

a. ICl3 b. S2Br2 c. AsO3 d. XeF6

5: Which covalent species would be considered free radicals?

1. hydrogen monoxide
2. carbon dioxide
3. phosphorus disulfide
4. ammonia (NH3)
1. silicon tetrafluoride
2. nitrogen dioxide
3. carbon disulfide
4. diphosphorus pentoxide

1.

2.

3.
4.
1. ICl3
2. S2Br2
3. AsO3
4. XeF6
1. H2O and NH3 (water and ammonia) (answers will vary)

This page titled 4.E: Valence Electrons and Bonding (Exercises) is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Elizabeth Gordon.