Making and Naming Ionic Compounds

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Making and Naming Ionic Compounds
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Ionic Compoundsthe basics

• Metals form positive ions.
• Non-metals form negative ions.
• So, metals joined to nonmetals form ionic
  compounds
• Metals transfer electrons to nonmetals.
• The valence electrons determine the formula.

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• Group 1 metals form 1 ions.
• Group 2 metals form 2 ions.
• Group 13 metals form 3 ions.
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• Group 17 nonmetals form -1 ions.
• Group 16 nonmetals form -2 ions.
• Group 15 nonmetals form -3 ions.

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Example K (metal) Group1, so 1 valence e-Ion
K1 Cl (nonmetal)Group 17 (7A), so 7 valence
e- Ion Cl-1
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Formula Writing and Naming

• Formula write the positive ion first.
• Name Write the positive ion first, add the
  suffix ide to the negative ion.
• So, Formula KCl
• Name potassium chloride

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Example- Show the formation of Na2O.

• Name sodium oxide

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Show the formation of CaCl2.

• Name calcium chloride

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• Show the formation of the following ionic
  compounds using electron-dot structures (Lewis
  structures). Also write the names of the
  compounds.
• a)  K3P
• b)  NaF
• c)  Al2O3
• d)  KF
• e)  Li2O
• f)  Ca3P2

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Formulas For Ionic CompoundsThe Cross-Over
Method ExamplesDetermine the formula for the
compound that is formed when each of the
following types of ions interact.
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beryllium phosphide
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• Write the formula and the name for the ionic
  compound formed from each of the following types
  of ions.
• a)  Ca2 and Cl-
• b)  Al3 and N3-
• c)  Be2  and O2-
• d)  Be2 and N3-
• e)  K and S2-

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What about those ones in the middle?

• Metals, so they form positive ions (cations)
• They can form different ions eg, Fe2, Fe3

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Examples.
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Ionic compounds with transition metals

• FeCl3 Fe3 Cl1-
• Cl Fe Cl
• FeCl3
• Cl
• iron(III) chloride
• Cu2S
• Cu S Cu Cu1 S2-
• copper(I) sulfide

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• Write the formulas for the following compounds.
• copper(I) oxide
• lead(IV) bromide
• iron(III) sulfide
• nickel(III) fluoride
• manganese(IV) sulfide
• Write the names of the following compounds.
• FeCl3
• FeO
• Cu2O
• PbO2

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Polyatomic ionsions made up of 2 or more
elements.
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Ionic compounds with polyatomic ions

• NH41 and S2-
• NH4 S NH4
• NH41 S2-
• (NH4)2S
• ammonium sulfide

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• Write the formula and the name for the following
  ionic compounds
• a) Ca NO3
• b) Na OH
• c) Na SO4
• d) Ca PO4
• e) Li HCO3