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Together with the metals and nonmetals, the metalloids (or semimetals) form one of the three categories of chemical elements as classified by ionization and bonding properties. They have properties intermediate between those of metals and nonmetals. There is no unique way of distinguishing a metalloid from a true metal but the most common is that metalloids are usually semiconductors rather than conductors.The known metalloids are:
New elements that should be metalloids
- ununhexiumUnunhexium is the temporary name of an unconfirmed synthetic superheavy element in the periodic table that has the temporary symbol Uuh and has the atomic number 116. Some research has referred to it as "eka-polonium". History In 1999, researchers at Lawr (Uuh)
- ununseptiumUnunseptium is the temporary name of an undiscovered chemical element in the periodic table that has the temporary symbol Uus and has the atomic number 117. History Ununseptium has not yet been discovered. Ununseptium is a temporary IUPAC systematic eleme (Uus) (117; not yet synthesized)
In the periodic tableThe periodic table of the chemical elements is a tabular display of the known chemical elements. The elements are arranged by electron structure so that many chemical properties vary regularly across the table. Each element is listed by its atomic number, metalloids occur along the diagonal line from boron to polonium. Elements to the upper right of this line are nonmetals; elements to the lower left are metals.
Chemical element groups
