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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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