Which statement regarding the formation of an alloy is correct?
A)Carbon forms an interstitial alloy with iron because their atomic radii are about the same.
B)Carbon forms a substitutional alloy with iron because their atomic radii are about the same.
C)Carbon forms an interstitial alloy with iron because carbon has a much smaller atomic radius.
D)Carbon forms a substitutional alloy with iron because carbon has a much smaller atomic radius.
E)Carbon forms an interstitial alloy with iron because carbon has a much larger atomic radius.

Question

Quizplus · Accepted Answer

In an interstitial alloy, the smaller atoms fit into the interstitial sites between the larger atoms. Carbon has a smaller atomic radius than iron, so it can fit into the interstitial sites between iron atoms.

Which Statement Regarding the Formation of an Alloy Is Correct