Electron Cancellation Activity：电子消除活性.docx

Physical Science CP Ionic Bonding Puzzle ActivityName:Objective: Students will be able to write and name the chemical formula of ionic compounds by modeling ionic compounds.Introduction: When metals and nonmetals chemically react, the atoms will tend to form ions, or charged atoms. Ions form because electrons are either gained or lost. Metals will generally form cations, or positive ions. Nonmetals will form anions, or negative ions. For an ionic bond, the overall charge of the compound is neutral, or zero. Activity: You will work with a partner to create models of ionic compounds and write the chemical formula of the ionic compounds you have created. Writing Chemical FormulasStep 1: Write the symbols of the elements- metal first and non-metal secondStep 2: Write the charge each element forms as an ion above the elementStep 3: Write a subscript next to each one to explains how many shapes of each element there are in the situation*Remember: Ones are invisible!Example: Lithium + IodineExample: Hydrogen + OxygenStep 1: Li IStep 1: H O Step 2: Li+1 I-1Step 2: H+1 O+2 Step 3: Li1I1 LiI Step 3: H2OI H2OH+1I-1Li+1O-2H+1Directions: Using your ionic bonding pieces, create each bond listed on the following pages. The shape of each ion shows you the number of electrons it will gain or lose to from a bond. After fitting the pieces together, sketch the pieces and fill in the table with information about the ions forming the bond.Example: sodium and chlorineSketch:Cl-1H+1Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical FormulasodiumNa+1Nacation1NaClchlorideCl-1Clanion11: potassium and bromineSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula2: potassium and chlorineSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula3: sodium and nitrogenSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula4: sodium and oxygenSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula5: potassium and sulfurSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula6: beryllium and oxygenSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula7: calcium and bromineSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula8: magnesium and oxygenSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula8: gallium and bromineSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula9: aluminum and nitrogenSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula10: aluminum and sulfurSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula11: calcium and nitrogen (You can make any additional ions using the blank pieces)Sketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical Formula12: aluminum and oxygenSketch:Ion NameIon SymbolDot DiagramAnion/CationHow Many?Chemical FormulaPost Activity Questions:1) Is each compound formed by just one cation or anion?2) Why do some