Metalloid is a term used in chemistry when classifying the chemical elements. Metalloids are the elements found in the periodic table along the line that distinguishes metals from non-metals. This line is drawn from between Boron and Aluminum to the border between Polonium and Astatine. The only exception to this is Aluminum, which is classified under “Other Metals”. Metalloids have properties of both metals and non-metals. Some of the metalloids, such as silicon and germanium, are semi-conductors. This means that they can carry an electrical charge under special conditions. The term semimetal is sometimes used synonymously, but this is sometimes defined differently. Properties of metalloids usually include that they form amphoteric oxides and often behave as semiconductors.
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