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Understanding Chemical Bonding and the Octet Rule: A Classroom Guide

This resource explores the principles of chemical bonding and the Octet Rule within a high school chemistry context. Students will learn how atoms seek to achieve stable electron configurations resembling noble gases by gaining or losing electrons. The guide includes examples of compounds and salts, highlights the characteristics of various elements, and encourages practice through questions that reinforce understanding. Engaging scenarios and practice rounds help students solidify their grasp of electron configurations, ionic bonds, and molecular formations.

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Understanding Chemical Bonding and the Octet Rule: A Classroom Guide

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  1. Do Now • Which answer represents a compound? • He • Br • NaCl • U • Which answer represents a salt? • C6H12O6 • CaBr2 • Fe • CH3COOH

  2. Chemical Bonding, Part 2 Williamsburg High School for Architecture and Design Mr. Quinn and Ms. Tom 11/13/13

  3. Aim • Can all atoms satisfy the Octet Rule?

  4. Think Back… • To the Octet Rule! • All atoms must have 8 electrons in their outer shell • What about the ones that don’t?

  5. The Rules • All elements want to look like noble gases • They can either gain or lose electrons to get there

  6. Ok, but which one? • He: 2 • Li: 2-1 • Ne: 2-8

  7. So where did the electrons go? • Ar: 2-8-8 • K: 2-8-8-1 • Kr: 2-8-18-8 • Ar: 2-8-8 • Br: 2-8-18-7 • Kr: 2-8-18-8

  8. Practice, Round 1 • Ne: 2-8 • Mg: 2-8-2 • Ar: 2-8-8 • He: 2 • O: 2-6 • Ne: 2-8

  9. Practice, Round 2 • Kr: 2-8-18-8 • Rb: 2-8-18-8-1 • Xe: 2-8-18-18-8 • Kr: 2-8-18-8 • I: 2-8-18-18-7 • Xe: 2-8-18-18-8

  10. How about some molecules? • He: 2 • C: 2-4 • Ne: 2-8 • Ne: 2-8 • Si: 2-8-4 • Ar: 2-8-8

  11. Nonmetals share electrons with other nonmetals!

  12. From Yesterday… • Stealing electrons forms a . • Sharing electrons forms a .

  13. Examples of Molecules:

  14. Regents Practice, Round 1 • Which symbol represents an atom in the ground state with the most stable valence electron configuration? • B • O • Li • Ne

  15. Regents Practice, Round 2 • Which substance contains bonds that involved the transfer of electrons from one atom to another? • CO2 • NH3 • KBr • Cl2

  16. Regents Practice, Round 3 • When sodium and fluorine combine to produce the compound NaF, the ions formed have the same electron configuration as atoms of • argon, only • neon, only • both argon and neon • neither argon nor neon

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