Estimate large and small quantities quick check the radius of a hydrogen atom is 0.00000529177 of a millimeter Express this digit as an approximation
The given digit is already expressed with its full precision. However, if you want to express it as an approximation, you can round it to a more readable value.
Rounding the given digit, we have:
0.00000529177 ≈ 0.000005 mm