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Home , Barium sulfide

Review Questions: Chemical Nomenclature - Naming Compounds

1. What are binary compounds? Compounds that contain only two different elements.

2. When naming binary compounds that contain a metal and a nonmetal, is the anion or cation named first? The cation. Always start with the positive ion (located on the left side of the periodic table).

3. When naming binary compounds that contain a transition metal, a Roman numeral is often included in the name. What does the Roman numeral represent and when must it be included in the name of the compound? The charge on the ion; NOT the number of atoms found in the compound.

4. Why are prefixes included in the name of binary compounds that contain two nonmetals? Because they can combine in various proportions; the prefix gives the number of atoms found in the compound; since two nonmetals “share electrons” they do NOT become ions and the ratio of atoms is NOT based on their charges.

5. What number do the following prefixes represent? di- = ___2____ mono- = ____1____ penta- = ____5____ tetra- = ____4____

6. What is a polyatomic ion? A group of atoms with a positive or negative charge.

7. What is the for the chromate and dichromate polyatomic ions?

-2 -2 Chromate ion = CrO Dichromate ion = Cr2O7

8. What is the chemical formula for the phosphate and phosphite polyatomic ions?

-3 -3 Phosphate ion = PO4 Phosphite ion = PO3

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9. Select the correct name for each formula given below and place the correct answer in the last column.

Formula A B C Answer

1. KBr phosphorous bromide potassium bromate potassium bromide ___C___

2. BaSO4 sulfate barium ___A___

3. Cu2O dicopper oxide copper (II) oxide copper (I) oxide ___C___

4. Fe2(SO4)3 iron (II) sulfate iron (III) sulfate iron (II) sulfite ___B___

5. N2O4 nitrogen oxide nitrogen tetraoxide dinitrogen tetraoxide ___C___

6. K3PO4 potassium phosphate potassium phosphide calcium phosphate ___A___

7. Al2O3 aluminum (II) oxide aluminum oxide dialuminum trioxide ___B___

8. NH4Cl nitrogen hydrogen chloride ammonium chlorite ammonium chloride ___C___

9. Br2O3 bromium oxide dibromium trioxide bromium (II) oxide (III) ___B___

10. SrS strontium (II) sulfide ___C___

11. ZnSO4 zinc sulfate zinc sulfite ___B___

12. Ag2O silver oxide disilver oxide silver (II) oxide ___A___

13. Na2CrO4 sodium dichromate sodium chromate ammonium chromate ___B___

14. Ca(C2H3O2)2 calcium oxalate carbon acetate calcium acetate ___C___

15. Cu3(PO4)2 copper (II) phosphate copper (III) phosphate copper phosphite ___A___

16. KI potassium iodite potassium iodate potassium iodide ___C___

17. Cu(OH)2 copper hydroxide copper dihydroxide copper (II) hydroxide ___C___

18. Pb(NO2)2 lead (II) nitrate lead (II) nitrite phosphorous nitrite ___B___

19. CrBr3 chromium (III) bromite chromium bromide chromium (III) bromide ___C___

20. LiClO2 lithium chloride lithium chlorite lithium chlorate ___B___

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10. Select the correct formula for each chemical name given below and place the correct answer in the last column.

Name A B C Answer

1. Ba(NO3)2 BaNO3 Ba3N2 ___A____

2. Tin (IV) bromide SnBr4 SnBr3 SnBr2 ___A____

3. Potassium iodate K2IO3 KIO3 KIO4 ___B____

4. Sodium dichromate Na(CrO4)4 Na2CrO4 Na2Cr2O7 ___C____

5. Nickel (III) bromide NiBr3 Ni3Br NiBrO3 ___A____

6. Copper (II) sulfate Cu3S2 Cu2(SO4)3 CuSO4 ___C____

7. Aluminum sulfate AlSO4 Al2(SO4)3 Al2SO4 ___B____

8. Calcium oxalate CaC2O4 Ca(C2O4)2 CaCO3 ___A____

9. Zinc sulfate ZnS ZnSO4 ZnSO3 ___B____

10. Ammonium nitrate NH4NO3 NH4NO2 NH4N ___A____

11. Potassium chlorate KCl KClO3 KClO2 ___B____

12. Tin (II) sulfide SnS TiS Sn2S ___A____

13. Iron (III) chloride Fe3Cl FeCl3 FeClO3 ___B____

14. Silver chromate Si2CrO4 Ag2CrO4 AgCrO4 ___B____

15. Magnesium carbonate MgCO3 Mg(HCO3)2 Mg2C ___A____

16. Mercury (II) oxide Hg2O HgO HgO2 ___B____

17. BaOH Ba(OH)2 Ba(OH)3 ___B____

18. Chromium (II) sulfide Cr2S CrS CrSO4 ___B____

19. Lead (IV) nitrite Pb4N3 Pb(NO3)4 Pb(NO2)4 ___C____

20. Dinitrogen trioxide N3O2 N2O3 Ni2O3 ___B____

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