Boron, arsenic, and antimony, among other substances, are used as dopants when added to a pure semiconductor material to alter its electrical characteristics.
Artificially produced gemstones[?] (such as Ruby (gemstone)) usually contain a dopant to identify them as such.
... 65 years of age or older. The average household size is 3.10 and the average family size is 3.52.
In the town the population is spread out with 26.0% under the age of ...