Rank the following in order of relative size, from smallest (1) to largest (4).

Bacterium cell:

Nanometer:

Person:

Proton:

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