meter?
3
there isn't one.
There are many units which are used to measure the lengths of the object . The smallest unit of length is fero meter.
A millimeter is one thousandth of a meter.A a decimeter is one tenth of a meter.so millimeter is the smallest unit.
Zepto- at 1X10^-21 or 0.000 000 000 000 000 000 001
There is only one unit of measure for current: the ampere. All currents are measured in amps or fractions of amps or their equivalent.
An atom is the smallest unit. Anything polyatomic is not an atom.
A Centigram is the second smallest unit to measure mass
The smallest unit of measure for longitude is seconds. There are 60 seconds in 1 minute of longitude.
There is no smallest measurement since you cannot compare the size of a second (time) with a gram (mass). Furthermore, by suitable use of prefices, you can always find a smaller unit even if it has no real life application.
The smallest unit on a measuring device is typically referred to as the resolution or precision of the device. It represents the smallest increment by which the device can measure. The size of this unit will vary depending on the specific measuring device being used.
sometimes decimeter, sometimes centimeter(if it measures mm)