Coinage metals are metals that are not easily oxidized.Based on the activity series,which metal would be least desirable as a coinage metal?
A)Mn
B)Au
C)Ca
D)Co

Question

Quizplus · Accepted Answer

The activity series arranges metals in order of their reactivity with oxygen, water, and acids. The least reactive metals are at the top of the activity series, while the most reactive metals are at the bottom. Ca (calcium) is much more reactive than the other options, and therefore would be the least desirable as a coinage metal because it would quickly tarnish and corrode. Mn, Au, and Co are all less reactive and more suitable for use in coins.

Coinage Metals Are Metals That Are Not Easily Oxidized