Pico, Femto, Atto, What is next?

[Bob Lauder]

> The title says it all. What is the correct prefix for 10^-21?

 10^-21 - zepto - z
 10^-24 - yocto - y

 10^21 - zetta - Z
 10^24 - yotta - Y

 So 1 yocto mole doesn't have many molecules :-)

Bob

==============================================================================
Bob Lauder,				bsa016 at cent1.lancs.ac.uk
Post Doctoral Research Associate,	
Division of Biological Sciences,	VOICE - (+44) (0)524 65201 Ex 3461
Lancaster University,  U.K.		FAX   - (+44) (0)524 843854