Below, atomic radius, crystal structure, electronegativity, and the most common valence

are tabulated, for several metals. Please apply for conditions for substitutional solid

solution (Hume - Rothery rule) to answer questions.

(a) Which metal is most likely to form a substitutional solid solution with Cu?

(b) Please explain your idea.

Radius Structure nega- (nm) tivity 0.1278 FCC 1.9 0.1445 FCC 1.9 0.1431 FCC 1.5 0.1253 HCP 1.8 0.1249 BCC 1.6 0.1241 BCC 1.8 0.1246 FCC 1.8 0.1376 FCC 2.2 Zn 0.1332 HCP 1.6 +2 (a) Which metal is most likely to form a substitutional solid solution with Cu? Answer: (b) Please explain your idea. (8 points) Cu Co Cr Fe Ni Pd +2 +1 +3 +2 +3 +2 +2 +2