MCAT General Chemistry Question 20: Answer and Explanation

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Question: 20

5. Antimony is used in some antiparasitic medications—specifically those targeting Leishmania donovani. What type of element is antimony?

  • A. Metal
  • B. Metalloid
  • C. Halogen
  • D. Nonmetal

Correct Answer: B

Explanation:

Antimony (Sb) is on the right side of the Periodic Table, but not far right enough to be a nonmetal, choice (D). It certainly does not lie far enough to the right to fall in Group VIIA (Group 17), which would classify it as a halogen, choice (C). While sources have rarely classified antimony as a metal, choice (A), it is usually classified as a metalloid, choice (B).

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