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Entry Task:

Entry Task:. Look up Conservation of Mass or Law of Conservation of Mass in the textbook. Write the definition. DEMO. NaHCO 3 + CH 3 COOH  H 2 O + CO 2 + CH 3 COONa. How many atoms of each element?. Reactants. Products. NaHCO 3 + CH 3 COOH  H 2 O + CO 2 + CH 3 COONa. Na = H =

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Entry Task:

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  1. Entry Task: • Look up Conservation of Mass or Law of Conservation of Mass in the textbook. • Write the definition. DEMO NaHCO3 + CH3COOH  H2O + CO2 + CH3COONa

  2. How many atoms of each element? Reactants Products NaHCO3 + CH3COOH  H2O + CO2 + CH3COONa Na = H = C = O = 1 5 3 5 Na = H = C = O = 1 5 3 5

  3. Open textbook to Unit B Chapter 2 Section 2 page 47 (6.2 Study Guide) • We’ll be using the pictures to help us understand the notes we’re taking on the study guide. • Remember to highlight the Big Idea, Key Concept, Review and other notes that I point out. • Slides # 4-9 will have a lot of the answers to the study guide. Complete and keep to use for the final in May.

  4. The Teacher Tube link on this page will explain today’s lesson about ions. • http://www1.teachertube.com/viewVideo.php?video_id=136591&title=Ions

  5. Chemical bonds between atoms involve electrons.

  6. Atoms can transfer electrons. negative ion makes a positive ion

  7. http://viewpure.com/CV53wfl-oV8 IONS

  8. Forming Ionic Bonds and Names of Ionic Compounds • What is an ionic bond? A bond created by the force of attraction between positive and negative ions.

  9. Vocabulary box to answer question #4 Use the terms on the left to fill in the question. They are not in the correct order. • +1 • Metals • Negative ions • -1 • Non-metals • Positive ions

  10. Naming Ionic Compounds Take the name of the positive metal element barium. Take the name of the negative non-metal chlorine and give it an “ide” ending. 3. Combine 2 names Barium Chloride

  11. Bonding Basics 8th Grade Science T. Trimpe 2008 http://sciencespot.net/

  12. Group # 1,2,13,14,15,16,17,18 Will it gain or lose electrons? How many? Atomic #Number Cl 17 7 1 1- 19 1 1 1+ K K1+ F1- K F K F

  13. CATION ANION “Cat-Eye-On” “An-Eye-On” Answer these questions: An atom that gains one or more electrons will have a ____________________ charge. An atom that loses one or more electrons will have a ____________________ charge. An atom that gains or loses one or more electrons is called an ____________. A positive ion is called a ______________ and a negative ion is called an _______________. NEGATIVE POSITIVE ION

  14. What is an ionic bond? Atoms will transfer one or more ________________ to another to form the bond. Each atom is left with a ________________ outer shell. An ionic bond forms between a ___________ ion with a positive charge and a ________________ ion with a negative charge. Example B1: Sodium + Chlorine Example B2: Magnesium + Iodine ELECTRONS COMPLETE METAL NONMETAL I Mg Na Cl I1- Mg2+ I1- Cl1- Na1+ NaCl MgI2

  15. Example B3: Potassium + Iodine Example B4: Sodium + Oxygen Example B5: Calcium + Chlorine Example B6: Aluminum + Chlorine

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