The submarine seawater valve alloy noted is 70 percent copper and 30 percent nickel; which element is the nickel?

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Multiple Choice

The submarine seawater valve alloy noted is 70 percent copper and 30 percent nickel; which element is the nickel?

Nickel is the element being referred to. In the alloy described as 70% copper and 30% nickel, the 30% component is the element nickel itself, not some other substance. In other words, the nickel in this alloy is the metal nickel, which has the symbol Ni and is added to copper to form cupronickel, a material valued for its corrosion resistance in seawater environments. So the correct understanding is that the term “nickel” designates the element nickel; the other options—tin, zinc, and aluminum—are different elements and would not be the nickel in this alloy.

Nickel is the element being referred to. In the alloy described as 70% copper and 30% nickel, the 30% component is the element nickel itself, not some other substance. In other words, the nickel in this alloy is the metal nickel, which has the symbol Ni and is added to copper to form cupronickel, a material valued for its corrosion resistance in seawater environments.

So the correct understanding is that the term “nickel” designates the element nickel; the other options—tin, zinc, and aluminum—are different elements and would not be the nickel in this alloy.

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