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Chemical Bonding Part IChemical Bonding Part I

ElectronegativityElectronegativity is the ability of an atom to attract shared

electrons to itself.It is largely the difference between the electronegativities of two

atoms which determines what kind of bond is formed between them.

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ElectronegativityWhat is the most electronegative element?What is the least electronegative element (aside fromthe noble gases)?What is the range of electronegativity for the metals?Metalloids? Nonmetals?Why is the electronegativity of the noble gases listedas zero?For an electron shared between hydrogen and chlorine,would you expect the electron to be closer to thehydrogen or the chlorine?(Discuss these problems in discuss problems section if you don’t know answer

to any of the problem. Just post your doubt in chemsitry section)

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Electronegativity

Chemical Bonding

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Chemical Bonding

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Types of Bonding

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Types of Bonding

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Types of Bonding

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Properties

Chemical Bonding determines the physical properties of a compound. These properties are listed as in the next slide

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Physical Properties of Covalent Bonds

• Gas, liquid, or a soft solid.• Low melting point and low boiling point.• Insoluble in H2O• Soluble in nonpolar solvents.• Nonconductor of heat and electricity.• Nonlustrous

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Physical Properties of Ionic Bonds

• Crystalline solid.• Very high melting point.• Soluble in H2O.• Insoluble in nonpolar solvents.• Nonconductor of heat and electricity.• Conducts electricity in aqueous solutions.• Examples: NaCl, CaCO3

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Physical Properties of Metallic Bonds

• Malleable solid.• High melting point and boiling point.• Insoluble in H2O.• Insoluble in nonpolar solvents.• Conducts heat and electricity.• Lustrous• Examples: gold, copper

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In slides to comeWe will be discussing some topics in details in chemical bonding . In particular, things to cover in chemical bonding are:• Polar Bonds• Metallic Bonding• Intermolecular Forces• Ions: Counting Electrons And Protons• Ionic And Atomic Radii• Ions And Energy• Lithium Fluoride• Crystal Packing• Crystal Packing• Crystal Packing• Covalent H2• Quantization• Bond Length And Strength• Strong And Weak Bonds• Strong And Weak Bonds• Covalent To Metallic• Electron Delocalization

Best of lucks. In the mean time, we may also be introducing some inorganic materials along with the chemical bonding series.

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