Question

for each of the following questions, determine whether the compound is ionic or covalent and name it appropriately.

1. nh₄cl
2. xef₆
3. pf₅
4. fe(no₃)₃
5. tlbr₃
6. krf₂
7. brcl₅
8. cu₃p
9. scl₄
10. snse₂
11. tetraphosphorus triselenide
12. potassium acetate
13. iron (ii) phosphide
14. disilicon hexabromide
15. titanium (iv) nitrate
16. diselenium diiodide
17. copper (i) phosphate
18. gallium (ii) oxide
19. tetrasulfur dinitride

Explanation:

Step1: Classify bond type first

Ionic = metal/ammonium + nonmetal/polyatomic ion; Covalent = nonmetal + nonmetal

Step2: Name ionic compounds

Use cation (with Roman numeral if variable charge) + anion name

Step3: Name covalent compounds

Use prefixes for atom counts, -ide suffix

Step4: Write formulas from names

Ionic: balance charges; Covalent: use prefixes for subscripts

Answer:

1. Ionic; Ammonium chloride
2. Covalent; Xenon hexafluoride
3. Covalent; Phosphorus trifluoride
4. Ionic; Iron(III) nitrate
5. Ionic; Titanium(III) bromide
6. Covalent; Krypton difluoride
7. Covalent; Bromine pentachloride
8. Ionic; Copper(I) phosphide
9. Covalent; Sulfur tetrachloride
10. Ionic; Tin(IV) selenide
11. Covalent; $\text{P}_4\text{Se}_3$
12. Ionic; $\text{KC}_2\text{H}_3\text{O}_2$
13. Ionic; $\text{Fe}_3\text{P}_2$
14. Covalent; $\text{Si}_2\text{Br}_6$
15. Ionic; $\text{Ti(NO}_3\text{)}_4$
16. Covalent; $\text{Se}_2\text{I}_2$
17. Ionic; $\text{Cu}_3\text{PO}_4$
18. Ionic; $\text{GaO}$
19. Covalent; $\text{S}_4\text{N}_2$