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.
Trace element Facts for Kids. Kiddle Encyclopedia.