Using data in table 21 determine the number of significant

Question

2.93 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 mass of ¹H and ¹H+ is significant.

(b) What percentage of the mass of an ¹H atom does the electron represent?