INTERPRETING CHEMICAL FORMULAS AND SYMBOLS THE FORMULA OR SYMBOL REPRESENTS: CHEMICAL FORMULA OR SYMBOL NUMBER OF ATOMS TOTAL CHARGE NUMBER OF PROTONS NUMBER OF ELECTRONS Atom Molecule Monatomic Cation Monatomic Anion Polyatomic Cation Polyatomic Anion H 2 O 3 0 10 10 Br 1 0 35 35 Br 2 2 0 70 70 Br 1-1 35 36 NO 2 3 0 23 23 NO 2 3-1 23 24 NH 4 + 5 +1 11 10 SO 3 4 0 40 40 2 SO 3 4-2 40 42 H 3 PO 4 8 0 50 50
FORMULAS AND NAMES OF BINARY COVALENT COMPOUNDS Fill the blanks in the following table. Formula Name Formula Name CO carbon monoxide P 4 O 10 tetraphosphorus decaoxide CS 2 carbon disulfide NH3 ammonia SO2 sulfur dioxide SF 6 sulfur hexafluoride SiC silicon carbide N2O3 dinitrogen trioxide N 2 O dinitrogen monoxide OF2 oxygen difluoride P4S3 tetraphosphorus trisulfide SiCl 4 silicon tetrachloride IF7 iodine heptafluoride CH4 methane H2O water SO 3 sulfur trioxide H 2 S 2 dihydrogen disulfide KrF2 krypton difluoride Cl2O7 dichlorine heptaoxide N 2 O 5 dinitrogen pentaoxide
FORMULAS AND NAMES OF BINARY IONIC COMPOUNDS (1) Write the formula for each ion below the ion s name. (2) Fill in the blanks with the correct formula and name of the compound formed by the combination of ions. Chloride ion Oxide ion Bromide Sulfide ion Nitride ion Cl O 2 Br S 2 N 3 Sodium ion Na + NaCl sodium chloride Na 2 O sodium oxide NaBr sodium bromide Na 2 S sodium sulfide Na 3 N sodium nitride Copper (I) ion CuCl Cu 2 O CuBr Cu 2 S Cu 3 N Cu + copper (I) chloride copper (I) oxide copper (I) bromide copper (I) sulfide copper (I) nitride Calcium ion CaCl 2 CaO CaBr 2 CaS Ca 3 N 2 Ca 2+ calcium chloride calcium oxide calcium bromide calcium sulfide calcium nitride Iron (II) ion FeCl 2 FeO FeBr 2 FeS Fe 3 N 2 Fe 2+ iron (II) chloride iron (II) oxide iron (II) bromide iron (II) sulfide iron (II) nitride Iron (III) ion FeCl 3 Fe 2 O 3 FeBr 3 Fe 2 S 3 FeN Fe 3+ iron (III) chloride iron (III) oxide iron (III) bromide iron (III) sulfide iron (III) nitride Aluminum ion AlCl 3 Al 2 O 3 AlBr 3 Al 2 S 3 AlN Al 3+ aluminum chloride aluminum oxide aluminum bromide aluminum sulfide aluminum nitride
FORMULAS OF IONIC COMPOUNDS WITH MONO- AND POLYATOMIC IONS For each box write the chemical formula of the compound formed by the cation at the head of the column and the anion at the left of the row. Li + Mg 2 + NH + 4 Al 3 + Na + Ba 2 + K + Ca 2 + Br LiBr MgBr 2 NH 4 Br AlBr 3 NaBr BaBr 2 KBr CaBr 2 SO 2 4 Li 2 SO 4 MgSO 4 (NH 4 ) 2 SO 4 Al 2 (SO 4 ) 3 Na 2 SO 4 BaSO 4 K 2 SO 4 CaSO 4 OH LiOH Mg(OH) 2 Al(OH) 3 NaOH Ba(OH) 2 KOH Ca(OH) 2 F LiF MgF 2 NH 4 F AlF 3 NaF BaF 2 KF CaF 2 O 2 Li 2 O MgO Al 2 O 3 Na 2 O BaO K 2 O CaO NO 3 LiNO 3 Mg(NO 3 ) 2 NH 4 NO 3 Al(NO 3 ) 3 NaNO 3 Ba(NO 3 ) 2 KNO 3 Ca(NO 3 ) 2 PO 3 4 Li 3 PO 4 Mg 3 (PO 4 ) 2 (NH 4 ) 3 PO 4 AlPO 4 Na 3 PO 4 Ba 3 (PO 4 ) 2 K 3 PO 4 Ca 3 (PO 4 ) 2 Cl LiCl MgCl 2 NH 4 Cl AlCl 3 NaCl BaCl 2 KCl CaCl 2 S 2 Li 2 S MgS (NH 4 ) 2 S Al 2 S 3 Na 2 S BaS K 2 S CaS I LiI MgI 2 NH 4 I AlI 3 NaI BaI 2 KI CaI 2 CO 2 3 Li 2 CO 3 MgCO 3 (NH 4 ) 2 CO 3 Al 2 (CO 3 ) 3 Na 2 CO 3 BaCO 3 K 2 CO 3 CaCO 3
FORMULA-TO-NAME EXERCISE Give a correct chemical name for each of the following compounds. 1. MgO magnesium oxide 2. PbI2 lead (II) iodide 3. FeS iron (II) sulfide 4. ZnSO4 zinc sulfate 5. Li2CO3 lithium carbonate 6. Ba(NO3)2 barium nitrate 7. NH4NO2 ammonium nitrite 8. K2SO3 potassium sulfite 9. CrCl3 chromium (III) chloride 10. Sr(C2H3O2)2 strontium acetate 11. Mg3N2 magnesium nitride 12. Ca3(PO4)2 calcium phosphate 13. SnO2 tin (IV) oxide 14. KMnO4 potassium permanganate 15. Hg2Cl2 mercury (I) chloride 16. NaHCO3 sodium hydrogen carbonate (sodium bicarbonate) 17. CCl4 carbon tetrachloride 18. NO2 nitrogen dioxide 19. N2O5 dinitrogen pentaoxide 20. PBr5 phosphorus pentabromide 21. CaO2 calcium peroxide 22. HCl(aq) hydrochloric acid 23. HNO3(aq) nitric acid 24. H2SO3(aq) sulfurous acid 25. H3PO4(aq) phosphoric acid
NAME-TO-FORMULA EXERCISE Give a correct chemical name for each of the following compounds. 1. Potassium iodide KI 2. Barium sulfate BaSO 4 3. Aluminum nitrate Al(NO 3 ) 3 4. Copper (II) carbonate CuCO 3 5. Gold (III) chloride AuCl 3 6. Ferric hydroxide Fe(OH) 3 7. Lead (II) chromate PbCrO 4 8. Nickel (II) hydroxide Ni(OH) 2 9. Mercury (II) bromide HgBr 2 10. Silver acetate AgC 2 H 3 O 2 11. Magnesium chlorate Mg(ClO 3 ) 2 12. Sodium peroxide Na 2 O 2 13. Manganese (II) phosphate Mn 3 (PO 4 ) 2 14. Ammonium sulfide (NH 4 ) 2 S 15. Platinum (IV) fluoride PtF 4 16. Chromium (III) hydroxide Cr(OH) 3 17. Calcium oxalate CaC 2 O 4 18. Antimony trichloride SbCl 3 19. Ammonia NH 3 20. Silicon dioxide SiO 2 21. Carbon monoxide CO 22. Hydrobromic acid HBr(aq) 23. Nitrous acid HNO 2 (aq) 24. Acetic acid HC 2 H 3 O 2 (aq) 25. Sulfuric acid H 2 SO 4 (aq)