1. IIIIIIIV Unit 6 - Chemical Bonding I. Introduction to Bonding

2. IONIC COVALENT Bond Formation Type of Structure Solubility in Water Electrical Conductivity Other Properties e - are transferred from metal to nonmetal high yes (solution or liquid) yes e - are shared between two nonmetals low no usually not Melting Point crystal lattice true molecules A. Types of Bonds Physical State solid liquid or gas

3. “electron sea” METALLIC Bond Formation Type of Structure Solubility in Water Electrical Conductivity Other Properties Melting Point A. Types of Bonds Physical State e - are delocalized among metal atoms very high yes (any form) no malleable, ductile, lustrous solid

4. RETURN A. Types of Bonds

5. RETURN A. Types of Bonds

6. Ionic Bonding - Crystal Lattice RETURN A. Types of Bonds

7. Covalent Bonding - True Molecules RETURN A. Types of Bonds Diatomic Molecule

8. Metallic Bonding - “Electron Sea” RETURN A. Types of Bonds

9. B. Vocabulary zChemical Bond yelectrical attraction between nuclei and valence e - of neighboring atoms that binds the atoms together ybonds form in order to… xdecrease PE xincrease stability

10. B. Vocabulary CHEMICAL FORMULA Molecular Formula Unit IONICCOVALENT CO 2 NaCl

11. B. Vocabulary COMPOUND Ternary Compound Binary Compound 2 elements more than 2 elements NaNO 3 NaCl

12. B. Vocabulary ION Polyatomic Ion Monatomic Ion 1 atom 2 or more atoms NO 3 - Na +

13. C. Bond Polarity zMost bonds are a blend of ionic and covalent characteristics.

14. zNonpolar Covalent Bond ye - are shared equally ysymmetrical e - density yusually identical atoms C. Bond Polarity

15. ++ -- zPolar Covalent Bond ye - are shared unequally yasymmetrical e - density yresults in partial charges (dipole)

16. zNonpolar zPolar zIonic View Bonding Animations.Bonding Animations C. Bond Polarity

17. zElectronegativity yAttraction an atom has for a shared pair of electrons. yhigher e - neg atom   - ylower e - neg atom   +

18. C. Bond Polarity zElectronegativity Trend (p. 151) yIncreases up and to the right.

19. C. Bond Polarity zDifference in the elements’ e - negs determines bond type