Chapter 11 Physics A First Course Energy and Change

Energy and Change Changes in Matter 11.1 Chemical Bonds 11.2 Chemical Reactions 11.3 Nuclear Reactions

Chapter 11.1 Objectives and Vocabulary Explain why most atoms combine with other atoms to make compounds. Predict whether a chemical bond is ionic or covalent. Describe the difference between ionic and covalent bonds. ionic bond covalent bond ion

Ionic and Covalent Bonds

11A Investigation: Energy and Chemical Changes Key Question: How do chemical changes involve energy? *Students read text section 11.2 AFTER Investigation 11A

11A Investigation Topics Measure materials. Observe chemical reactions. Measure temperature changes. Compare exothermic and endothermic reactions. Graph temperature vs. time for reactions.

Instant Cold Packs NH 4 NO 3 + H 2 O + energy -> NH 4 + (aq) + NO 3 - (aq) CaCl 2 + H 2 O -> Ca 2+ (aq) + Cl - (aq ) + energy Snow Melt

Chapter 11.2 Objectives and Vocabulary chemical reaction reactant product chemical equation activation energy exothermic endothermic photosynthesis respiration Recognize the signs of chemical change. Explain how energy is used or released by chemical reactions. Write an equation for a chemical reaction.

11B Investigation: Nuclear Reactions and Radioactivity Key Question: How do nuclear changes involve energy? *Students read text section 11.3 AFTER Investigation 11B

11B Investigation Topics Perform model radioactive decay experiment. Graph amount of matter vs. trial. Compare decay experiment to nuclear reactions and atom structure. Build model atoms. Predict half-life of radioactive materials.

Chapter 11.3 Objectives and Vocabulary nuclear reaction chain reaction radioactive radioactive decay alpha decay beta decay gamma decay half-life Compare and contrast nuclear reactions and chemical reactions. Explain the difference between fusion and fission reactions. Describe what is happening in radioactive decay.