Question

The radius of a hydrogen atom is 0.0000000529177 of a millimeter. Express this number as an approximation.

My answer would be 0.00000005.

Is this correct? If not, can you explain why?

Answer 1

What about 0.0000000053?

Answer 2

Your answer is almost correct. The given value has 10 decimal places. Rounding to 8 decimal places, the number can be approximated as 0.00000005. However, keep in mind that approximation depends on the desired level of precision. If a higher level of precision is needed, rounding to fewer decimal places may not be sufficient.

Answer 3

0.0000000053 is also a valid approximation of the given value. It has 9 decimal places and provides slightly more precision compared to rounding to 0.00000005. Once again, the choice of approximation depends on the desired level of precision required for the given context.