The picometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: pm) or picometer (American spelling) is a unit of length in the metric system, equal to1×10−12m, or one trillionth (11000000000000) of a metre, which is the SI base unit of length. This is the unit used to measure atoms due to their size.
The picometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: pm) or picometer (American spelling) is a unit of length in the metric system, equal to1×10−12m, or one trillionth (11000000000000) of a metre, which is the SI base unit of length. This is the unit used to measure atoms due to their size.