# Homework1 (1).pdf - MSE 170 Autumn 2020, Homework 1 – Due...

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MSE 170 Autumn 2020, Homework 1Due at 5pm, Oct 9th2.18 The net potential energy between two adjacent ions, EN, may be represented by thesum of the Equations 2.9 and 2.11; that is equation 2.17:𝐸𝑁= −?𝑟+?𝑛Calculate the bonding energy E0in terms of the parameters A, B, and n using thefollowing procedure:1. Differentiate ENwith respect to r, and then set the resulting expression equal tozero, because the curve of ENversus r is a minimum at E0.2. Solve for r in terms of A, B, and n, which yields r0, the equilibrium interionicspacing.3. Determine the expression for E0by substituting r0in Equation 2.17.2.27 What type(s) of bonding would be expected for each of the following materials:brass (a copper zinc alloy), epoxy, barium sulfide (BaS), solid xenon, bronze, nylon, andaluminum phosphide (AlP)?3.5 Show that the atomic packing factor is for BCC is 0.68.𝑟
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