Table 1 shows some metric units of length used by microbiologists and biophysicists to quantify the dimensions of cells, viral capsids, and biomolecules.
Table 1
| Unit | Value in metres |
|---|---|
| picometre | 10−1210^{-12}10−12 m |
| attometre | 10−1810^{-18}10−18 m |
| micrometre | 10−610^{-6}10−6 m |
| nanometre | 10−910^{-9}10−9 m |
Give the name of the smallest unit of length shown in Table 1.
