The dividing line between metals and nonmetals is not quite as definite as it appears. For along both sides of the dark zigzag line are elements that have properties of both metals and nonmetals. These elements are called metalloids (MEHT-uh-loidz). The word metalloid means metallike. All metalloids are solids that can be shiny or dull.
They conduct heat and electricity better than nonmetals but not as well as metals. Metalloids are ductile and malleable. The metalloids include boron, silicon, germanium, arsenic, antimony, tellun'um, polonium, and astatine.

Do any of these elements sound familiar to you? If so, in what way? 

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