Metalloids are elements with properties of both metals and non-metals. Their ionization energies and electronegativities are between those of metals and non-metals, and their properties in chemical reactions are dependent on the other reactants.Continue Reading
Not all scientific sources agree on which elements are metalloids. Boron, silicon, germanium, arsenic, antimony and tellurium are the commonly agreed-upon metalloids; polonium, selenium and astatine are also sometimes included as metalloids. Carbon and aluminum are very rarely included due to their positions on the periodic table.
Because their electrical conductivity falls between that of conducting metals and insulating non-metals, metalloids are useful for electronic applications. Silicon is widely used as a semi-conductor in computer chips due to its abundance and the ease of fabricating materials from it. Boron, germanium, arsenic and antimony are also used as semi-conductors, though less often than silicon.
Metalloids are also used for commercial glass production, optical storage, fireworks and medicine. Silicon and boron are both essential trace elements to humans; the other metalloids are either toxic to humans or non-toxic but nonessential. Arsenic is highly toxic, but it is used to manufacture drugs to fight cancer and parasitic infections. Antimony is used for anti-parasitic drugs, while tellurium compounds are effective anti-microbial drugs.Learn more about Atoms & Molecules
An element's metallic properties refer to its propensity to behave like the elements that are classified as metals in the periodic table. This depends on the set of chemical properties commonly associated with the metallic elements, specifically the ability of an element to lose its outer valence electrons.Full Answer >
On the periodic table, silver belongs to the family of elements in group 11, as well as transitional metals. Some other elements in these families are copper and gold, and together these metals are sometimes referred to as the "coinage" metals.Full Answer >
Calcium belongs to the family of elements called the alkaline earth metals. It is placed in Period 4 and Group 2, or the S-block, of the Periodic Table of Elements. It is a soft grey metal with atomic number 20 and weighs 40.078 atomic mass units.Full Answer >
The properties of the oxygen family include the fact that, as atomic numbers increase, the elements in the family increase in metal similarity and decrease in electronegativity. All elements in the family exist in a natural state as ions.Full Answer >