Hóa đại cương - Phần 2

Relative attraction of an atom for electrons,its own and those of other atoms. Pauling Scale. Same trends as ionization energy, increasesfrom lower left corner to the upper rightcorner. fluorine: E.N. = 4.0
Nội dung trích xuất từ tài liệu:
Hóa đại cương - Phần 2 Chapter 2 CHEMICAL BONDSAND MOLECULAR STRUCTURE 123 Electronegativity• Relative attraction of an atom for electrons, its own and those of other atoms.• Pauling Scale.• Same trends as ionization energy, increases from lower left corner to the upper right corner.• fluorine: E.N. = 4.0 4Electronegativities of the Elements 56Type of Chemical BondingType Bonding• Non-polar bonds: diff. EN = 0• Polar bonds: diff. EN > 0• Ionic bonds: diff. EN > 1.5 7891010111112121313141415151616Ionic Compounds Ionic CompoundsNaCl; copper(II) sulfate pentahydrate (CuSO4•5H2O, blue);nickel(II) chloride hexahydrate (NiCl2•6H2O, green); potassiumdichromate K2Cr2O7, orange); and cobalt(II) chloride hexahydrate 18 18(CoCl2•6H2O)19192020