Diameters of atom, molecule, and cell

1. Atom
the diameters of atom range from the smallest of hydrogen to the largest Cesium are 0.5 to 5.2 A or 50 to 520 pm when in covalently   bound
2. bond length is from 100 to less than 300 pm
3.so molecular diameters are in the range of 100pm to somewhere. 10 nm molecule




Cells

a typical cell size is 10 µm and a typical cell mass is 1 nanogram. The human cell extrema are: largest - anterior horn in the spinal cord (135 μ vs. 120 μ for the ovum), longest - pseudounipolar cells which reach from extremities, including the toes to the lower brain stem, and smallest - granule cells in the cerebellum, at 4 µ.[2] The largest known cells are unfertilised ostrich egg cells, which weigh 3.3 pounds.[3][4]