Question #80ff6

1 Answer
May 8, 2015

As far as I know, the picometer is currently being used as the SI unit for atomic radii.

A picometer is equal to #10^(-12)"m"#.

The more traditional unit used was the angstrom, for which you have

#"1 angstrom" = 10^(-10)"m"#

Keep in mind, however, that angstroms are not SI units.

You'll sometimes see atomic radii expressed in nanometers, for which

#"1 nm" = 10^(-9)"m"#

However, nanometers are not used as often as picometers for atomic radii.