Impurities in Solids 4.6 Atomic radius, crystal structure, electronegativity, and the most common valence are given in the following table for several elements; for those that are nonmetals, only atomic radii are indicated. Atomic Radius Crystal Structure Electro- Element (пт) negativity Valence Ni 0.1246 FCC 1.8 +2 0.071 H. 0.046 0.060 Ag 0.1445 FCC 1.9 +1 Al 0.1431 FCC 1.5 +3 Co 0.1253 НСР 1.8 +2 Cr 0.1249 ВСС 1.6 +3 Fe 0.1241 ВСС 1.8 +2 Pt 0.1387 FCC 2.2 +2 Zn 0.1332 HCP 1.6 +2 Which of these elements would you expect to form the following with nickel: (a) a substitutional solid solution having com- :-

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Terminology in Metal Alloys

Metal is the pure chemical element you would find on the periodic table. 91 of the 118 elements on the periodic table are metals – which make them some of the most plentiful elements in the world.