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Naming Ionic Compounds

Naming Ionic Compounds. Metal with nonmetal Positive metal cation first Negative nonmetal anion second. Steps for Positive Cation. 1. Write the name of the element. 2. NH 4 is ammonium

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Naming Ionic Compounds

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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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