Which set of elements contains a metalloid?

Metals are generally hard, shiny and malleable. They are good conductors. Examples of metals are gold, silver, iron, uranium and zinc.

Non-metals are brittle and are not easily molded into shapes. They are poor conductors of heat and electricity. Examples of non-metal elements are hydrogen and carbon.

Metalloids share characteristics of both metals and non-metals and are also called semi-metals. Metalloids are typically semi-conductors, which means that they both insulate and conduct electricity. This semi-conducting property makes them very useful as a computer chip material. Examples of metalloid elements are silicon and boron.