Answer:
[tex]1.67\times 10^{-27}kg[/tex]
Explanation:
We are given that mass of proton
[tex]1.672623\times 10^{-27}kg[/tex]
There are seven significant figures.
We have to round off.
If we round off to three significant figures
The thousandth place of given mass of proton is less than five therefore, digits on left side of thousandth place remains same and digits on right side of thousandth place and thousandth replace by zero
Therefore, the mass of proton can be written as
[tex]1.67\times 10^{-27}kg[/tex]
Hence, the mass of proton is [tex]1.67\times 10^{-27}kg[/tex]
