Where are metalloids found?

• A. Found on the left side of the periodic table
• B. Are metals
• C. Found at the center of the periodic table
• D. Found along the stair step line

Answer: (D)

Metalloids have properties between metals and nonmetals, so they sit along the dividing line that runs diagonally across the periodic table—the stair-step line. This boundary runs from boron through silicon, germanium, arsenic, antimony, tellurium, and often includes iodine or astatine depending on the diagram. Elements on or near this line show mixed characteristics and are commonly used as semiconductors in electronics because their conductivity can be adjusted.

They aren’t all metals, and they’re not confined to the left side or the center of the table, which is why the staircase line is the correct place to look for metalloids.