Molecules and Solids (id: bbb041ade)

本题目来源于试卷: Molecules and Solids，类别为 IB物理学

[填空题]
In the ionic salt KF, the separation distance betwert u;kx/xrz. sr-k 3 /w(:mjkwg-xi y3en ions is about :d 9fjp gd t4ih)eq*(z0.27 nm.
(a) Estimate the electrostatic potential energy between the ions assuming them to be point charges (magnitude $ 1e $). PE =    eV
(b) It is known that F releases 4.07 eV of energy when it "grabs" an electron, and 4.34 eV is required to ionize K. Find the binding energy of KF relative to free K and F atoms, neglecting the energy of repulsion. Binding energy =   eV

参考答案:
空格1: -5.3±2%  空格2: 5±2% 


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