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Ionic and Covalent Bonding

Learn how to correctly name and write the formula for ionic and covalent compounds, as well as understand the properties of ionic and covalent solids. Includes informal and formal assessments.

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Ionic and Covalent Bonding

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  1. Ionic and Covalent Bonding

  2. Objective • Today I will be able to: • Correctly name and write the formula for ionic and covalent compounds • Describe the properties of ionic, and covalent solids • Evaluation/ Assessment • Informal assessment – Listening to group interactions as they complete the monoatomic and polyatomic ion sort and the naming formulas worksheets. • Formal Assessment – Analyzing student responses to the exit ticket and naming formulas worksheet • Common Core Connection • Build Strong Content Knowledge • Look for and express regularity in repeated reasoning

  3. Lesson Sequence • Warm – Up • Evaluate: Review Periodic Table Worksheet questions • Formal assessment • Explore: Cations vs. Anions • Informal assessment • Explore: Monoatomic and Polyatomic Ions Sort • Informal assessment • Explain: Writing Ionic Bond Formulas • Elaborate: Writing Ionic Formulas Practice • Formal assessment • Explain: Naming Ionic Compounds • Elaborate: Naming Ionic Compounds Practice • Formal assessment • Explain: Ionic Compound Properties and Naming Covalent Compounds • Evaluate: Exit ticket • Formal assessment

  4. Warm - Up • Which element has the larger radius? Explain. • Be or O • Which element has the smaller electronegativity? Explain. • Sr or Ra • Which element has the greater ionization energy? Explain. • S or Cl

  5. Objective • Today I will be able to: • Correctly name and write the formula for ionic and covalent compounds • Describe the properties of ionic, and covalent solids

  6. Homework • Study for Periodic Table (mini-exam) on Thursday and Friday • Wear closed toe shoes Thursday/Friday • STEM Fair • Final Research Paper due Monday December 17 • In Class Presentations Wednesday January 23

  7. Agenda • Review Periodic Table Questions Worksheet • Cation vs. Anion (pink sheet) • Monoatomic vs. Polyatomic Ions • Ionic Bonds • Writing formulas • Naming formulas • Properties • Covalent Compounds • Naming formulas • Properties • Exit Ticket

  8. Review Periodic Table Worksheet Answers Review responses as a class, students will keep responses to review for the exam.

  9. Review: Cation vs. Anion Pink Sheet

  10. Monoatomic Ion vs. Polyatomic Ion Class Discussion and Ion Sort

  11. Bonding

  12. Why do elements form bonds? • Every element wants a full outer energy level to satisfy the octet rule • They achieve this by gaining, losing and sharing electrons

  13. Ionic Bonds

  14. Ionic Bonds • Formed by the transfer of electrons from one atom to another • Generally between a metal and a nonmetal • Held together by electrostatic forces • (opposite charges attracting)

  15. Writing formulas – Two Methods • Snap it Together Method Na1+ Cl1- NaCl • Criss-Cross Method

  16. Writing Ionic Formula Practice Complete the worksheet. Please ask Ms. Ose for help with questions.

  17. Naming Ionic Compounds • Standard Naming Rules • Write the full name of the metal first • Then write the second element, take off the ending and add the suffix –ide • If the second ion is a polyatomic ion, use the full name of the ion • Examples • CaO – Calcium Oxide • BaCl2 – Barium Chloride

  18. Naming Ionic Compounds • Exceptions • Transition metals can have multiple oxidation numbers • Standard naming rules apply but we need to account for the oxidation number • use a roman numeral • Examples • FeCl3 – Iron(III) Chloride • FeCl2 – Iron (II) Chloride • PbCl4 – Lead(IV) Chloride

  19. Naming Ionic Compounds Practice Complete the worksheet. Please ask Ms. Ose for help with questions.

  20. Properties of Ionic Compounds • Crystalline Solid at room temperature • High melting and boiling points • Soluble in water (when they dissolve in water they conduct electricity)

  21. Properties of Ionic Compounds Cont. • Ionic compounds are hard, rigid and brittle • Crystalline Structure – crystal retains it shape until enough energy is applied to shift the positions and crack the crystal

  22. Ionic compound dissolved in water Solid ionic compound Molten ionic compound Ionic Compounds Properties Cont. • Molten state can also conduct electricity

  23. Exit Ticket • What’s wrong with the following formula/ name of compound? • Mg2Cl • MgSO4 – Magnesium sulfide • Baride Chlorine

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