Metalloids are the chemical elements in the periodic table located on the border between metals and nonmetals. They are characterized by the formation of covalent crystal lattice and the presence of metallic conductivity. The six elements commonly recognised as metalloids are boron, silicon, germanium, arsenic, antimony and tellurium. Other elements less commonly recognised as metalloids include carbon, aluminium, selenium, polonium and astatine.
So Germanium (Ge), Arsenic (As) and Tellurium (Te) are metalloids.