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Naming Ionic Compounds

Naming Ionic Compounds. Group 1A  +1 Group 2A  +2 Group 3A  +3 Group 4A  N/A Group 5A  -3 Group 6A  -2 Group 7A  -1 Group 8A  STABLE. The charges of monatomic ions , or ions containing only one atom, can be determined by referring to the periodic table. Charges.

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Naming Ionic Compounds

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  1. NamingIonic Compounds

  2. Group 1A  +1 Group 2A  +2 Group 3A  +3 Group 4A  N/A Group 5A  -3 Group 6A  -2 Group 7A  -1 Group 8A  STABLE The charges of monatomic ions, or ions containing only one atom, can be determined by referring to the periodic table Charges Elements will gain or lose electrons to have 8 valence electrons. (This is the octet rule)

  3. Ionic Compounds • ion: atom or group of atoms that has a charge • A monatomic ion is one element with a charge • A polyatomic ion is more than one element with a charge • Example: SO42- • ionic compound: compound formed between a cation ( +) and an anion (-). • usually between a metal and a nonmetal. • also form between a polyatomic ion (like ammonium) and either a metal or nonmetal. • TRANSFER valence electrons

  4. Formation of Ionic Compounds • objects with opposite charges attract each other. • ionic bond = the strong attractive force between ions of opposite charge • Strongest type of bond!! • the overall charge of the compound will be … • ZERO!

  5. Examples of Formula Writing • Write the formula for the compound formed between calcium and nitrogen • Step One: Write the symbols and charges of the ions formed • Ca2+ N3- • Step Two: Balance the charges so the total is ZERO • You will need 3 Calcium’s and 2 Nitride’s • Step Three: Write the Formula • Use subscripts to show the number of each ion needed • Ca3N2

  6. More examples • Write the formula between Mg and Br • Mg+2 Br -1 • MgBr2

  7. More examples • Write the formula for the compound formed between Ca and S • Ca+2 S-2 • CaS

  8. Polyatomic Ions • You must use parentheses when using subscripts with a polyatomic ion • Ex: Calcium nitrate • Ca +2 NO3-1 • Ca(NO3)2

  9. Formula writing with polyatomic Ions • Write the formula between ammonium and sulfate • NH4+1 SO4-2 • (NH4)2 SO4

  10. Copper (II) and chlorine Silver and Nitrate Magnesium and sulfite Calcium and sulfur Potassium and oxygen Ammonium and phosphate Ammonium and chlorine CuCl2 AgNO3 MgSO3 CaS K2O (NH4)3PO4 NH4Cl More examples

  11. Naming ionic compounds • In naming ionic compounds, name the cationfirst, then the anion. • Cation name does not change. • If the cation can have more than one charge (mostly transition metals), use a Roman Numeral after the element name to indicate the charge • Ex. Iron (II) for Fe2+ or Iron (III) for Fe3+ • Monatomicanions: change the ending to -ide. (ex. Br -, Cl-, O2-) • Polyatomic Ions: do not change the name (ex. SO42-, CO32-, PO43-

  12. NaCl MgSO4 CuSO3 K3PO4 Fe(NO3)2 Ca(ClO3)2 NH4NO2 Al(ClO)3 Sodium chloride Magnesium sulfate Copper (II) sulfite Potassium phosphate Iron (II) nitrate Calcium chlorate Ammonium nitrite Aluminum hypochlorite Examples

  13. Lead (IV) Oxide Ammonium Permanganate Cobalt (II) chloride Calcium sulfide Lithium nitrate Sodium acetate Tin (II) chloride PbO2 NH4MnO4 CoCl2 CaS LiNO3 NaCH3COO SnCl2 More examples

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