Trace element facts for kids
A trace element is present in only a small amount. The amount depends on context.
- In analytical chemistry, it is an element in a sample that has an average concentration of less than 100 parts per million (ppm) measured in atomic count, or less than 100 micrograms per gram.
- In biochemistry, it is one that is needed in minute quantities for the proper growth, development, and physiology of the organism. In biochemistry, a trace element is also referred to as a micronutrient. See Cofactor.
- In geology, its concentration is less than 1000 ppm or 0.1% of a rock's composition. The term is used mainly in igneous petrology.
See also
In Spanish: Elementos traza para niños
All content from Kiddle encyclopedia articles (including the article images and facts) can be freely used under Attribution-ShareAlike license, unless stated otherwise. Cite this article:
Trace element Facts for Kids. Kiddle Encyclopedia.