(1) Another group of elements - the metalloid or semi-metal elements - share some properties with the metals and some with the nonmetals.(2) As its two allotropic forms might suggest, silicon is a metalloid .(3) Chemically, elements can be classified as metals, metalloids , or non-metals based, in part, upon these physical properties.(4) Separating them are metalloids or semimetals.(5) Inasmuch as chemical properties determine toxicological properties, metalloids should not be considered as a subset of metals but as a subset of nonmetals.
