👉 A picogram (also known as a picocel or picomolar) is a unit of measurement used to measure small quantities of matter. It is defined as 10^(-9) parts per million, which means it's one part in every 10 million billion particles of an element. For example, a picogram would be equivalent to 10^-9 parts per trillion (or 10^(-9) parts per cubic meter), which is the smallest amount
