Answer:
1.) Proton
2.) Nanometer
3.) Bacterium cell
4.) Person
Explanation:
The average diameter of spherical bacteria is 0.5-2.0 µm. For rod-shaped or filamentous bacteria, length is 1-10 µm and diameter is 0.25-1 . 0 µm.
The root mean square charge radius of a proton is about 0.84–0.87 fm (or 0.84×10−15 to 0.87×10−15 m).
Nanometer = 1 × 10^-9 m
