Copy of Chemistry Unit 5A Notes (1).rtf - Chemistry Unit 5...

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Chemistry Unit 5 Lesson 1: Naming Ions Textbook Pages 264-269 Vocabulary/Main Ideas/Questions Definitions/Details/Answers Vocabulary · Monatomic ion · consist of a single atom with a positive or negative charge resulting from the loss or gain of one or more valence electrons, respectively. How can you determine the charges of METALLIC monatomic ions found in Group 1A, 2A and 3A? When the metals in Groups 1A, 2A, and 3A lose electrons, they form cations with positive charges equal to their group number. What is the rule for naming cations of Group 1A, 2A and 3A? Group 1A, Group 2A, and Group 3A metals are the same as the name of the metal, followed by the word ion or cation. How can you determine the charges of NONMETALLIC monatomic ions found in Group 5A, 6A, 7A, and 7A? The charge of any ion of a Group A nonmetal is determined by subtracting 8 from the group number. What is the rule for naming anions? How can you determine the charges of TRANSITION metal ions? The charges of the cations of many transition metal ions must be determined from the number of electrons lost. How is the “stock system” used to name metals with multiple ions. How do polyatomic ions differ from monatomic ions? How are they similar? Unlike a monatomic ion, a polyatomic ion is composed of more than one atom. But like a monatomic ion, a polyatomic ion behaves as a unit and carries a charge. Practice Page 269 #6 Write the symbol for the ion of each element. Classify the ion as an anion or a cation, and name the ion. Symbol (with charge) Anion or Cation Name Potassiu m K+ cation Potassiu m ion Oxygen O2- anion oxygen ion Bromine Br- anion bromine ion Tin (lost 2 e-) Sn2+ cation tin ll ion Berylliu m Be2+ cation berylliu m ion Cobalt (lost 3 e-) Co3+ cation Cobaltlll ion i filled in the chart
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Chemistry Unit 5 Lesson 2: Naming and Writing Formulas for Ionic Compounds Textbook Pages 271-279 Vocabulary/Main Ideas/Questions Definitions/Details/Answers Vocabulary · Binary compound · How do you determine the formula of a binary ionic compound? To write the formula of a binary ionic compound, first write the symbol of the cation and then the anion. Then add subscripts as needed to balance the charges. Explain the “criss-cross” method. the numerical value of the charge of each ion is crossed over and becomes the subscript for the other ion. How do you determine the name of a binary ionic compound? To name any binary ionic compound, place the cation name first, followed by the anion name How do you determine the name of a binary ionic compound that includes a metal with multiple charges? If the metallic element in a binary ionic compound has more than one common ionic charge, a Roman numeral must be included in the cation nam How do you determine the formula of a compound with a polyatomic ion?
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