Question

which lists only metalloids?
○ arsenic (as), sulfur (s), and polonium (po)
○ antimony (sb), tellurium (te), and gallium (ga)
○ boron (b), germanium (ge), and tellurium (te)
○ polonium (po), aluminum (al), and silicon (si)

Explanation:

To determine which list contains only metalloids, we recall the classification of elements:

• Metalloids have properties between metals and non - metals. Common metalloids include B, Si, Ge, As, Sb, Te, Po.
• For the first option: Sulfur (S) is a non - metal, so this option is incorrect.
• For the second option: Gallium (Ga) is a metal, so this option is incorrect.
• For the third option: Boron (B), germanium (Ge), and tellurium (Te) are all metalloids.
• For the fourth option: Aluminum (Al) is a metal, so this option is incorrect.

Answer:

boron (B), germanium (Ge), and tellurium (Te)