What Is Ionic Bonding?
CChemistry Exam #2 Study Guide (10/07/12)
I. Bonding a. Ionic Bonding i. Electrons are transferred ii. Ions are held together by electrostatic force b. Covalent Bonding iii. Electrons are somehow shared iv. Electrons are attracted to nuclei (shared)
II. Electronegativity c. The ability of an atom in a molecule to attract shared electrons to itself d. Measured on Pauling Scale e. Most electronegative: Fluorine. Then Oxygen. f. Depending on electronegativity of X and Y, there are 3 possibilities: v. X and Y have identical electronegativities (Non Polar) vi. X and Y have dissimilar electronegativities (Polar)- Y is slightly negative; has greater control than slightly positive X vii. X and …show more content…
Soluble in polar solvents like water xx. Insoluble in nonpolar solvents like Hexane xxi. Metal and Nonmetal xxii. Any compound that conducts electric current when melted n. Covalent xxiii. Low Melting Point and Boiling Point (solid/liquid/gas) xxiv. Insoluble in polar solvents (exception: Sugar!) xxv. Soluble in nonpolar solvents xxvi. Nonmetal and Nonmetal o. Crystals xxvii. All group 1 Alkali metals and Group 7 Halogens make crystals xxviii. Sublimation: solid to a gas!
VII. Lattice Energy p. Measure of how strongly ions interact together (compares sizes of ions) xxix. enthalpy of formation of the ionic compound from gaseous ions and as such is invariably exothermic xxx. the energy required to completely separate one mole of a solid ionic compound into gaseous ionic constituents q. Goes to closer energy (emits energy as heat)- always more negative number r. (+) = endothermic (absorbing energy) s. (-) = exothermic (releasing energy) t. Energy is released! xxxi.
I. Bonding a. Ionic Bonding i. Electrons are transferred ii. Ions are held together by electrostatic force b. Covalent Bonding iii. Electrons are somehow shared iv. Electrons are attracted to nuclei (shared)
II. Electronegativity c. The ability of an atom in a molecule to attract shared electrons to itself d. Measured on Pauling Scale e. Most electronegative: Fluorine. Then Oxygen. f. Depending on electronegativity of X and Y, there are 3 possibilities: v. X and Y have identical electronegativities (Non Polar) vi. X and Y have dissimilar electronegativities (Polar)- Y is slightly negative; has greater control than slightly positive X vii. X and …show more content…
Soluble in polar solvents like water xx. Insoluble in nonpolar solvents like Hexane xxi. Metal and Nonmetal xxii. Any compound that conducts electric current when melted n. Covalent xxiii. Low Melting Point and Boiling Point (solid/liquid/gas) xxiv. Insoluble in polar solvents (exception: Sugar!) xxv. Soluble in nonpolar solvents xxvi. Nonmetal and Nonmetal o. Crystals xxvii. All group 1 Alkali metals and Group 7 Halogens make crystals xxviii. Sublimation: solid to a gas!
VII. Lattice Energy p. Measure of how strongly ions interact together (compares sizes of ions) xxix. enthalpy of formation of the ionic compound from gaseous ions and as such is invariably exothermic xxx. the energy required to completely separate one mole of a solid ionic compound into gaseous ionic constituents q. Goes to closer energy (emits energy as heat)- always more negative number r. (+) = endothermic (absorbing energy) s. (-) = exothermic (releasing energy) t. Energy is released! xxxi.