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IIIIIIIV Ch. 6 & 7 - Chemical Bonding I. Introduction to Bonding (p. 161 – 163)

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Presentation on theme: "IIIIIIIV Ch. 6 & 7 - Chemical Bonding I. Introduction to Bonding (p. 161 – 163)"— Presentation transcript:

1 IIIIIIIV Ch. 6 & 7 - Chemical Bonding I. Introduction to Bonding (p. 161 – 163)

2 A. Vocabulary zChemical Bond yattractive force between atoms or ions that binds them together as a unit ybonds form in order to… xdecrease potential energy (PE) xincrease stability

3 A. Vocabulary CHEMICAL FORMULA Molecular Formula Unit IONICCOVALENT CO 2 NaCl

4 A. Vocabulary COMPOUND Ternary Compound Binary Compound 2 elements more than 2 elements NaNO 3 NaCl

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

6 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 B. Types of Bonds Physical State solid liquid or gas odorous

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

8 RETURN B. Types of Bonds

9 RETURN B. Types of Bonds

10 Ionic Bonding - Crystal Lattice RETURN B. Types of Bonds

11 Covalent Bonding - True Molecules RETURN B. Types of Bonds Diatomic Molecule

12 Metallic Bonding - Electron Sea RETURN B. Types of Bonds

13 C. Bond Polarity zMost bonds are a blend of ionic and covalent characteristics zDifference in electronegativity determines bond type

14 C. Bond Polarity zElectronegativity – Remember this? yAttraction an atom has for a shared pair of electrons. yhigher e - neg atom - ylower e - neg atom +

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

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

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

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

19 Examples: zCl 2 zHCl zNaCl =0.0 Nonpolar =0.9 Polar =2.1 Ionic


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