What are metalloids, and where are they found on the periodic table? what common properties do they share

Metalloids are elements along the "zig-zag line" on the periodic table. They are semi-conductors, some are shiny, some are dull, they are also somewhat malleable and ductile. Malleable means that the element can be rolled into a thin sheet of metal and ductile means that an element can be pulled into a wire. The eight (8) metalloids are Boron (B), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), Polonium (Po), and Astatine (At). 

Hope this helps :)