Question

answer the question correctly to continue: two engineers disagree about which element to use for a part that needs to resist corrosion and be lightweight. one suggests aluminum, the other suggests sulfur. who is correct and why? the engineer who suggests aluminum, because it is a metal that resists corrosion neither, because both are nonmetals the engineer who suggests sulfur, because it is soft and melts easily the engineer who suggests sulfur, because it is a conductor

Explanation:

Aluminum is a metal that can resist corrosion (due to the formation of a protective oxide layer) and is lightweight. Sulfur is a non - metal. Non - metals are generally not good for structural parts that need to resist corrosion in the context of engineering materials (they lack the metallic bonding which gives metals their useful properties like corrosion resistance in some cases). Also, sulfur is not a conductor (so the option about sulfur being a conductor is wrong), and being soft and melting easily (as mentioned for sulfur) are not desirable properties for a part that needs to be functional (so that option is wrong). And since one of the elements (aluminum) is a metal (so the "both are nonmetals" option is wrong).

Answer:

The engineer who suggests aluminum, because it is a metal that resists corrosion.