Which of the following elements will have the greatest solid solubility in copper? Atom Crystal Structure Electro- Element Radius (nm) negativity Valence Copper Zinc 0.128 FCC 1.8 +2 +2 +2, +4 +4 +2 +3 0.133 HCP 1.7 Lead 0.175 FCC 1.6 Silicon 0.117 Diamond cubic 1.8 0.125 0.143 Nickel FCC 1.8 Aluminum FCC 1.5

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