Monoatomic vs. Polyatomic Ions Naming Ionic Formulas

Common Core Connection 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

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

Warm-Up Why do atoms form ions? What is an ionic bond? What are the oxidation numbers of the elements below? Ca Po Ar

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

Homework Have a great Thanksgiving break!

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

Monoatomic vs. Polyatomic Ions Watch Ms. Ose’s demo on the board and take notes. Pass out pink sheet Monoatomic vs. Polyatomic Ions

PINK SHEET and POLYATOMIC IONS LIST Pass out to students PINK SHEET and POLYATOMIC IONS LIST

Writing Ionic Formulas

Two Methods Snap-It Together Criss-Cross Method

Snap-It Together Na1+ Cl1- NaCl

Snap-It Together Practice Ca2+ O2- H+ I- Al3+ P3-

Snap-It Together Answers CaO HI AlP

Criss-Cross Method

Criss-Cross Practice Mg2+ Cl- Na+ S2- Fe3+ O2-

Criss-Cross Answers MgCl2 Na2S Fe2O3

Writing Ionic Formulas Practice Complete the practice at your desk. Whatever you do not finish will become your homework. Writing Ionic Formulas Practice

Exit Ticket Determine what is wrong in the following ionic formula Al3Cl