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Naming Ionic Compounds

Naming Ionic Compounds. Ionic Compounds in water. Water’s formula is H 2 O. Take a look at pg 189. Ionic Compounds. Positive Ion is called a CATION . They are metals. Negative Ion is called an ANION . They are non-metals. Ionic Compounds. Notice the cross over of Charges

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Naming Ionic Compounds

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  1. Naming Ionic Compounds

  2. Ionic Compounds in water • Water’s formula is H2O. • Take a look at pg 189

  3. Ionic Compounds • PositiveIon is called a CATION. They are metals. • Negative Ion is called an ANION. They are non-metals.

  4. Ionic Compounds • Notice the cross over of Charges • The Cation is always written FIRST, Anion Second. • Ionic compounds are made up of metals and non-metals, the metal is written FIRST.

  5. Formation of Ionic CompoundsCrossing Rule Ca+2+ Cl-1 CaCl2

  6. Naming Rules • Step 1: The name of the metal is written first, the same way it is written on the periodic table • Step 2: Write the name of non-metal second, BUTchange the ending of the element to –ide. • Step 3: Remember the crossing rule and remember to reduce!

  7. Example Ca+2+Cl-1 CaCl2 Calcium Chloride Calcium +Chlorine => ide Chloride Note: Oxygen becomes oxide

  8. Multiple Ionic Charges & Names • Some Transition metals can have more than one charge and therefore more than one name.

  9. When writing the names • Write the name of the element followed by the Roman numeral. • EX: Cu2+ is written Copper(II) • So, what is the name of Fe3+? • How would you write the name of PbCl4?

  10. Polyatomic Compounds

  11. What is a polyatomic ion? • Polyatomic ions: groups of atoms that tend to stay together and carry an overall ioniccharge. See pg 196-197

  12. Table of Common Polyatomic Ions

  13. Polyatomic Compound Formulas • Formulas for polyatomic compounds is determined the same way as ionic compounds. Cation first, Anion second, cross over rule Al+3 + CO3-2 Al2(CO3)

  14. Naming Polyatomic Compounds • Step 1: Write the name of the metal first. • Step 2: Write the name of the polyatomic ion second. • Step 3: Smile, you’re done!

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