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added by Ts Dec. 19, 2018, 5:43 p.m.
Which of the following is the smallest unit of length?
nanometer
yoctometre
picometre
femtometre
Yocto is a unit prefix in the metric system denoting a factor of 10−24 or 0.000000000000000000000001. It was adopted in 1991 by the General Conference on Weights and Measures. It comes from the Latin/Greek octo (οκτώ), meaning "eight", because it is equal to 1000−8. Yocto- is the smallest official SI prefix.
Ts
0
Correct this question
wikipedia → Yocto-
3
Very interesting!
reach: rather globalchemistrymathematicsphysicsscience

History

This is a correction, under evaluation right now.
added by Tankey6 Dec. 21, 2025, 5:55 p.m.
+1 This change is good  Richard1
Which of the following units of length has the smallest prefix?
nanometre
quectometre
picometre
yoctometre
Quecto- (q) is a unit prefix in the metric system denoting a factor of 10^(-30) or 0.000000000000000000000000000001. It was adopted in 2022 by the 27th General Conference on Weights and Measures. It comes from q + the Latin "Decem" due to being 1000^(-10) + -to to match from femto- downwards. Quecto- is the smallest official SI prefix.
Tankey6
reach: rather globalchemistrymathematicsphysicsscienceunits

Votes

+1 Very interesting!  Doctor Yes
+1 Very interesting!  M
+1 Very interesting!  ---