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Metal that expands on solidification from the molten state is:

 # A metal that expands on solidification from the molten state is:
A. Gold
B. Silver
C. Bismuth
D. Copper



The correct answer is C. Bismuth.

Elemental bismuth is denser in the liquid phase than the solid, a characteristic it shares with germanium, silicon, gallium, and water. Bismuth expands 3.32% on solidification; therefore, it was long a component of low-melting typesetting alloys, where it compensated for the contraction of the other alloying components to form almost isostatic bismuth-lead eutectic alloys.

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