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Ionic bonding - naming. Chem -To-Go Lesson 14 Unit 4. Need a periodic table and an ion sheet. How to name ionic compounds. Write the name of the metal element, which is the positive ion.

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Ionic bonding naming
Ionic bonding - naming

Chem-To-Go Lesson 14

Unit 4

Need a periodic table and an ion sheet


How to name ionic compounds
How to name ionic compounds

  • Write the name of the metal element, which is the positive ion.

  • If the metal is a transition metal (except for Ag or Zn), draw parentheses for the Roman numeral. We’ll fill it in later.

  • Write the name of the negative ion.

    • If it is a monatomic ion (a plain ol’ element), then the ending will be –ide.

    • If it is a polyatomic ion, then the ending will be probably be –ite or –ate.

  • Fill in the Roman numeral. You’ll need to determine the ORIGINAL charge of cation. It’s that positive charge that goes in the parentheses.

  • Al2(SO4)3


    Example 2
    Example 2

    • Write the name of the metal element, which is the positive ion.

    • If the metal is a transition metal (except for Ag or Zn), draw parentheses for the Roman numeral. We’ll fill it in later.

    • Write the name of the negative ion.

      • If it is a monatomic ion (a plain ol’ element), then the ending will be –ide.

      • If it is a polyatomic ion, then the ending will be probably be –ite or –ate.

  • Fill in the Roman numeral. You’ll need to determine the ORIGINAL charge of cation. It’s that positive charge that goes in the parentheses.

  • CaCl2

    Tip: Be careful not to mistake the Cl2 portion for ClO2. Most polyatomic ions can be recognized by looking for O.


    Example 3
    Example 3

    • Write the name of the metal element, which is the positive ion.

    • If the metal is a transition metal (except for Ag or Zn), draw parentheses for the Roman numeral. We’ll fill it in later.

    • Write the name of the negative ion.

      • If it is a monatomic ion (a plain ol’ element), then the ending will be –ide.

      • If it is a polyatomic ion, then the ending will be probably be –ite or –ate.

  • Fill in the Roman numeral. You’ll need to determine the ORIGINAL charge of cation. It’s that positive charge that goes in the parentheses.

  • Na2CO3

    Helpful Tip: Don’t be intimidated by polyatomic ions. Simply find the metal, and the rest of the compound is the anion. If the anion has more than one element, then it is a polyatomic ion.


    Example 4
    Example 4

    • Write the name of the metal element, which is the positive ion.

    • If the metal is a transition metal (except for Ag or Zn), draw parentheses for the Roman numeral. We’ll fill it in later.

    • Write the name of the negative ion.

      • If it is a monatomic ion (a plain ol’ element), then the ending will be –ide.

      • If it is a polyatomic ion, then the ending will be probably be –ite or –ate.

  • Fill in the Roman numeral. You’ll need to determine the ORIGINAL charge of cation. It’s that positive charge that goes in the parentheses.

  • CuF2

    Helpful Tip: Don’t ever backwards criss-cross to find the polyatomic ion. If the subscripts have been reduced, then you’ll make a mistake.


    Comparison examples
    Comparison Examples

    LiNO2

    LiNO3

    Li3N


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