Chapter 33 Appendix I: Experimentally Measured Masses of Selected Isotopes

Isotope	Mass (amu)	Isotope	Mass (amu)	Isotope	Mass (amu)
¹H	1.007825	¹⁴N	14.003074	²⁰⁸Po	207.981246
²H	2.014102	¹⁶O	15.994915	²¹⁰Po	209.982874
³H	3.016049	⁵²Cr	51.940508	²²²Rn	222.017578
³He	3.016029	⁵⁶Fe	55.934938	²²⁶Ra	226.025410
⁴He	4.002603	⁵⁹Co	58.933195	²³⁰Th	230.033134
⁶Li	6.015123	⁵⁸Ni	57.935343	²³⁴Th	234.043601
⁷Li	7.016005	⁶⁰Ni	59.930786	²³⁴Pa	234.043308
⁹Be	9.012182	⁹⁰Rb	89.914802	²³³U	233.039635
¹⁰B	10.012937	¹⁴⁴Cs	143.932077	²³⁴U	234.040952
¹¹B	11.009305	²⁰⁶Pb	205.974465	²³⁵U	235.043930
¹²C	12	²⁰⁷Pb	206.975897	²³⁸U	238.050788
¹³C	13.003355	²⁰⁸Pb	207.976652	²³⁹Pu	239.052163
¹⁴C	14.003242

Data source: G. Audi, A. H. Wapstra, and C. Thibault, The AME2003 atomic mass evaluation.

This table is provided as a reference.

Isotope	Mass (amu)	Isotope	Mass (amu)
⁸B	8.024607	²⁰⁹Fr	208.99592
⁴⁰K	39.963998	²¹⁰Po	209.982874
⁵²Cr	51.940508	²¹²At	211.990745
⁵⁸Ni	57.935343	²¹⁴Pb	213.999797
⁵⁹Co	58.933195	²¹⁴Bi	213.998712
⁶⁰Co	59.933817	²¹⁶Fr	216.003198
⁶⁰Ni	59.930786	¹⁹⁹Pb	198.972917
⁹⁰Sr	89.907738	²²²Rn	222.017578
⁹²Kr	91.926156	²²⁶Ra	226.025410
¹⁴¹Ba	140.914411	²²⁷Ra	227.029178
¹⁴³Xe	142.935110	²²⁸Ac	228.031021
¹⁶⁷Os	166.971550	²³⁰Th	230.033134
¹⁷¹Pt	170.981240	²³³U	233.039635
¹⁹⁴Hg	193.965439	²³⁴Th	234.043601
¹⁹⁴Tl	193.971200	²³⁴Pa	234.043308
¹⁹⁹Pb	198.972917	²³³U	233.039635
¹⁹⁹Bi	198.977672	²³⁴U	234.040952
²⁰⁶Pb	205.974465	²³⁵U	235.043930
²⁰⁷Pb	206.975897	²³⁸Pa	238.054500
²⁰⁸Pb	207.976652	²³⁸U	238.050788
²⁰⁸Bi	207.979742	²³⁹Pu	239.052163
²⁰⁸Po	207.981246	²⁴⁵Pu	245.067747