Metalloid
Metalloid
Metalloid (pronunciation: /ˈmɛtəlɔɪd/), also known as a semi-metal, is a term used in chemistry to describe a type of chemical element that exhibits properties of both metals and nonmetals.
Etymology
The term "metalloid" originates from the Greek words metallon, meaning "metal", and eidos, meaning "form" or "species". It was first used in the early 19th century to describe elements that were difficult to classify as either metals or nonmetals.
Characteristics
Metalloids generally have properties that are intermediate between metals and nonmetals. They can form ionic and covalent bonds, and they often behave as semiconductors. Some common metalloids include silicon, boron, and arsenic.
Related Terms
- Periodic table: A tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and recurring chemical properties. Elements are divided into groups and periods, including metals, nonmetals, and metalloids.
- Semiconductor: A material that has an electrical conductivity value falling between that of a conductor, such as metallic copper, and an insulator, such as glass. Semiconductors are the foundation of modern electronics, including transistors, solar cells, and most ICs. Many metalloids are semiconductors.
- Chemical bond: A lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. Metalloids can form both ionic and covalent bonds.
External links
- Medical encyclopedia article on Metalloid
- Wikipedia's article - Metalloid
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