Question

elements from period 3 of the periodic table are highlighted. which element is a metalloid? a. sodium b. silicon c. sulfur d. argon

Explanation:

Metalloids have properties intermediate between metals and non - metals. Sodium (Na) is a metal. Sulfur (S) and Argon (Ar) are non - metals. Silicon (Si) has properties of both metals (e.g., can conduct electricity to some extent) and non - metals (e.g., brittle), so it is a metalloid.

Answer:

B. Silicon