Introduction to Materials Science For Engineers, 9th Edition by Pearson

Answers to Practice Problems (PP) and Odd-Numbered Problems

Note that the solutions to all Practice Problems are provided on the Instructor’s Resource Center.

Chapter 2

 

PP 2.1 (a) 3.38 × 10¹⁰ atoms; (b) 2.59 × 10¹⁰ atoms

PP 2.2 3.60 kg

PP 2.3 (a) 19.23 mm; (b) 26.34 mm

PP 2.4 (b) Mg: 1s²2s²2p⁶3s², Mg²⁺: 1s²2s²2p⁶; O: 1s²2s²2p⁴; O²⁻: 1s²2s²2p⁶; (c) Ne for both cases of Mg²⁺ and O²⁻

PP 2.5 (a) F_c = 20.9 × 10⁻⁹ N; (b) F_R = −F_c = −20.9 × 10⁻⁹ N

PP 2.6 (a) sin (109.5°/2) = R/(r + R) or r/R = 0.225; (b) sin 45° = R/(r + R) or r/R = 0.414

PP 2.7 CN = 6 for both cases

PP 2.8

PP 2.9 Same as for Practice Problem 2.8, except R = C₆H₅

PP 2.10 (a) 60 ...