Of the following, which is most likely to form interstitial carbides?

Question

Quizplus · Accepted Answer

Interstitial carbides are formed by transition metals which have a small enough atomic radius to allow carbon atoms to fit in the interstitial sites. Boron and silicon do not have small enough atomic radii to form interstitial carbides. Active metals, alkali metals, and alkaline earth metals are not good candidates for interstitial carbide formation because they have larger atomic radii and are more likely to form ionic compounds rather than covalent interstitial compounds.

Of the Following, Which Is Most Likely to Form Interstitial