In the following table of 
nuclide	ratio of atomic mass to mass number, the mass of the nucleus is 
given by the ratio x 1 a.m.u., where 1 a.m.u. = 1.6606x10<sup>-24</sup> g.

1H	1.00782505
2H	1.0070508885
3H	1.0053497592
3He	1.0053431064
4He	1.0006508135
6Li	1.0025204658
12C	1
14N	1.0002195718
16O	0.9996821637
56Fe	0.9988381696
210Po	0.9999184462
232Th	1.0001640315
238U	1.0002133958