Question: The ionic substances KF, CaO, and ScN are iso-electronic (they have the same number of electrons). Examine the lattice energies for these substances in Table

The ionic substances KF, CaO, and ScN are iso-electronic (they have the same number of electrons). Examine the lattice energies for these substances in Table 8.2, and account for the trends you observe.

TABLE 8.2 Lattice Energies for Some Ionic Compounds Lattice Energy Lattice Energy Compound (kJ/mol) Compound(k)/mol) LiF LiCl Lil NaF NaCl NaBr Nal KF KCI KBr CsCl CsI MgCl2 SrCl2 2326 1030 834 730 910 788 732 682 808 701 671 657 600 2127 MgO CaO SrO 3795 3414 3217 ScN 7547

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KF 808 kJmol CaO 3414 kJmol SeN 7547 kJmol The sizes of the ions vary as follows Sc 3 Ca 2 K ... View full answer

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