It is common in mass spectrometry to assume that the mass of a cation is the same as that of its parent atom. (a) Using data in Table 2.1, determine the number of significant figures that must be reported before the difference in masses of and is significant. (b) What percentage of the mass of an atom does the electron represent?
Step 1 of 3
The given isotopes - and . Those differ by only one proton.
According to the given table, the mass of the proton is 1.0073 amu.