Monoatomic vs. Polyatomic Ions Naming Ionic Formulas

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Monoatomic vs. Polyatomic IonsNaming Ionic
Formulas
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• Objectives
• Today I will be able to
• Differentiate between monoatomic and polyatomic
  ions
• Write ionic formulas using the criss-cross and
  snap-it together methods
• Informal assessment monitoring student
  interactions and questions as we complete the
  writing formulas practice
• Formal assessment analyzing responses to the
  practice and exit ticket
• Common Core Connection
• Build strong content knowledge
• Look for and express regularity in repeated
  reasoning

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Lesson Sequence

• Evaluate Warm-Up
• Explore Monoatomic vs. Polyatomic Ions
• Explain Writing Ionic Formulas (Snap-it vs.
  Criss-Cross)
• Elaborate Writing Ionic Formula Practice
• Evaluate Exit Ticket

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Warm-Up

• Why do atoms form ions?
• What typical charge does the alkaline earth metal
  family form? What about the halogens?
• What is an ionic bond?

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Objectives

• Today I will be able to
• Differentiate between monoatomic and polyatomic
  ions
• Write ionic formulas using the criss-cross and
  snap-it together methods

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Homework

• Finish Writing Ionic Formulas Worksheet
• Abstract Due Monday, December 9

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Agenda

• Warm-Up
• Oxidation Numbers
• Monatomic vs. Polyatomic Ions
• Writing Ionic Formulas
• Snap-It
• Criss-Cross
• Writing Ionic Formulas Practice
• Exit Ticket

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Oxidation Numbers

• What are oxidation numbers?
• How do we find them for a single element?
• Lets review the worksheet

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Monoatomic vs. Polyatomic Ions

• Watch Mr. Klotzs demo on the board and take
  notes.

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PINK SHEET

• Pass out to students

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Writing Ionic Formulas
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Two Methods

• 1) Snap-It Together
• 2) Criss-Cross Method

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Snap-It Together

• Na1 Cl1-
• NaCl

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Snap-It Together Practice

• 1) Ca2 O2-
• 2) H I-
• 3) Al3 P3-

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Snap-It Together Answers

• CaO
• HI
• AlP

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Criss-Cross Method
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Criss-Cross Practice

• 1) Mg2 Cl-
• 2) Na S2-
• 3) Fe3 O2-

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Criss-Cross Answers

• MgCl2
• Na2S
• Fe2O3

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Writing Ionic Formulas Practice

• Complete the practice at your desk. Whatever you
  do not finish will become your homework.

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Exit Ticket

• Determine what is wrong in the following ionic
  formula
• Al3Cl