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Chapter 8 Test Review

Chapter 8 Test Review. Polar- unequal sharing of electrons Non-polar - equal sharing of electrons Electronegativity- ability to attract electrons. Properties of Covalent bonds. Bond length decreases as number of covalent bonds increases .

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Chapter 8 Test Review

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  1. Chapter 8 Test Review

  2. Polar- unequal sharing of electrons • Non-polar - equal sharing of electrons • Electronegativity- ability to attract electrons

  3. Properties of Covalent bonds • Bond length decreases as number of covalent bonds increases. • Bond strength increases as number of covalent bonds increases • Bond length increases as number of covalent bonds decreases • Bond strength decreases as number of covalent bonds decreases.

  4. Sigma and Pi bonds • Sigma- • Single covalent bond • Single bond- 1 sigma • Pi • Multiple covalent bonds • Double bond- 1 sigma, 1 pi bond • Triple bond- 1 sigma, 2 pi bonds

  5. 28. Which diagram correctly depicts the trend in electronegativity?

  6. How many atoms in each formula? • CH3OH • CH4 • PF3 • OF2 • NO2- • BH3 • SO42- • CN- • N2H2

  7. Covalent Bonds • How many covalent bonds can elements in the following groups form: • Group 1 (alkali metals) • Group 2 (alkali earth metals) • Group 3 • Group 4 • Group 5 • Group 6 • Group 7 (halogens) • Group 8 ( noble gases)

  8. Polar or non-polar • Shares equally • Does not share equally

  9. Diatomic Molecules • List the 7 diatomic molecules:

  10. Naming Molecules • SiS4 • PCl5 • CCl4 • NO

  11. Writing Formulas • Sulfur difluoride • Silicon tetrachloride • Chlorine trifluoride • Tetrasulfur heptanitride

  12. Lewis structures • CH3OH • BH3 • N2H2

  13. Lewis Structures with polyatomic ions • SO42- • CN-

  14. Molecular Shapes • CH4 • PF3 • OF2 • NO2-

  15. Lewis Structures with resonance • NO3– • CO32-

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