prov:value
| - As concrete examples of the base metal, such metals as Na, K, Cs, Ni, Co, Fe, Cr, Cu, V, Pr, Mg, Mo, W, Mn, Zn, Ga, Y, Ti, Ba Re, Bi, Nb, Ta, La, Ag, and Au which belong to Groups I, II, IIIB, IV, V, VIB, VIIB, and VIII in the Periodic Table of the Elements may be cited.
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