Ionic Bonding Formula Writing

• Objective– Today I will be able to:

• Correctly name and write the formula for ionic compounds• Explain what happens to electrons during ionic bonding

• 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

Lesson Sequence• Warm – Up• 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• Evaluate: Exit ticket

– Formal assessment

See what you remember from Biology Warm - Up

• Define and give an example of an ionic bond

• Define and give an example of a covalent bond

• What type of bond gives water its unique properties?

Objective

• Today I will be able to:– Correctly name and write the formula for ionic

compounds– Explain what happens to electrons during ionic

bonding

Homework

• Finish Writing Ionic Formulas Worksheet

Agenda• Warm - Up• Cation vs. Anion (pink sheet)• Monoatomic vs. Polyatomic Ions• Ionic Bonds

– Definition

– Writing formulas• Snap it Together Method• Criss Cross Method

• Exit Ticket

Review: Cation vs. Anion

Pink Sheet

Monoatomic Ion vs. Polyatomic Ion

Class Discussion and Ion Sort

Bonding

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

Ionic Bonds

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)

Writing formulas – Two Methods

• Snap it Together Method

Na1+ Cl1-

NaCl

• Criss-Cross Method

Exit Ticket

• What’s wrong with the following formula/ name of compound?

• Mg2Cl

• BaOH2

• OBe