An attogram (ag) is a metric unit of mass in the International System of Units (SI). It represents one quintillionth (1/1,000,000,000,000,000,000) of a gram or 10^-18 grams. The metric system is a decimal-based system of measurement used worldwide, and it is particularly useful for expressing extremely small quantities of mass.
To provide context for the size of an attogram:
Attograms are used in advanced scientific and technical fields, especially in situations where measuring the smallest quantities of substances or particles is crucial. Some common applications of attograms include:
Grain: The grain is a unit of mass primarily used for measuring the weight of small objects or quantities, especially in the context of bullets, ammunition, and some food products. One grain is approximately equal to 0.0648 grams.