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Ionic Compound Naming Guidelines Simplified

Learn how to name ionic compounds with metal and nonmetal elements. Follow steps to determine the charge of transition metals such as Sn and Pb. Understand the rules for naming positive metal cations and negative nonmetal anions for accurate compound naming.

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Ionic Compound Naming Guidelines Simplified

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  1. Naming Ionic Compounds

  2. Metal with nonmetal • Positive metal cation first • Negative nonmetal anion second

  3. Steps for Positive Cation • 1. Write the name of the element. • 2. NH4 is ammonium • 3. For transition metals, Sn (tin), and Pb (lead) determine the charge and use a Roman numeral

  4. How to Determine the Charge of A Transition Metal, Sn or Pb • Most transition metals, Sn and Pb have more than one possible charge. • Therefore, you can not look at group numbers • Example: Manganese can be Mn2+ , Mn3+ , Mn4+ , Mn5+ , Mn6+ , Mn7+

  5. How to Determine the Charge of A Transition Metal, Sn or Pb • 1. Use the charge of the negative anion, because you know it • 2. Then use algebra

  6. How to Determine the Charge of A Transition Metal, Sn or Pb • The total + positive charge and the total – negative charge always add up to zero.

  7. How to Determine the Charge of A Transition Metal, Sn or Pb • Example • Cu2O • Step 1 Use the charge of the anion O is oxygen Group 6A so 6 valence electrons Easier to gain 2 than to lose 6 So it is O2-

  8. How to Determine the Charge of A Transition Metal, Sn or Pb • Step 2 Use algebra Cu2x O -2 2x + (-2) = 0 2x – 2 = 0 2x = 2 X = 1 so we write copper (I)

  9. Steps for Negative Anion • 1. For polyatomic ion (flash cards) write the name as it is • 2. For monatomic (one element) drop the ending and add “ide” • Example: Cl is chlorine becomes chloride

  10. Examples • Cu2 O we already saw in this formula Cu is a transition metal and is copper (I) O is oxygen, so it becomes oxide copper (I) oxide • Al2 (CO3)3 • Al is aluminum and CO3 is polyatomic (flash cards) and is called carbonate aluminum carbonate

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