Divalent ionic crystals. Barium oxide has the NaCl structure. Estimate the cohesive energies per molecule of the hypothetical crystals Ba*O¯ and Ba**O¯- referred to separated neutral atoms. The observed nearest-neighbor internuclear distance is R, = 2.76 Å; the first and second ionization potentials of Ba are 5.19 and 9.96 eV; and the electron affinities of the first and second electrons added to the neutral oxygen atom are 1.5 and -9.0 eV. The first electron affinity of the ++ %3D

Divalent ionic crystals. Barium oxide has the NaCl structure. Estimate the cohesive energies per molecule of the hypothetical crystals Ba*O¯ and Ba**O¯- referred to separated neutral atoms. The observed nearest-neighbor internuclear distance is R, = 2.76 Å; the first and second ionization potentials of Ba are 5.19 and 9.96 eV; and the electron affinities of the first and second electrons added to the neutral oxygen atom are 1.5 and -9.0 eV. The first electron affinity of the ++ %3D

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.

Question

Divalent ionic crystals. Barium oxide has the NaCl structure. Estimate the
cohesive energies per molecule of the hypothetical crystals Ba*O¯ and Ba**O¯-
referred to separated neutral atoms. The observed nearest-neighbor internuclear
distance is R, = 2.76 Å; the first and second ionization potentials of Ba are 5.19
and 9.96 eV; and the electron affinities of the first and second electrons added
to the neutral oxygen atom are 1.5 and -9.0 eV. The first electron affinity of the
++
%3D

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