元素の同位体精密質量と天然存在比


元　素	原子量	同位体	精密質量	天然存在比（%）

H	1.00794	¹H	1.007825	99.985
H	1.00794	²H	2.014102	0.015

C	12.0108	¹²C	12.000000	98.90
C	12.0108	¹³C	13.003355	1.10

N	14.00674	¹⁴N	14.003074	99.634
N	14.00674	¹⁵N	15.000109	0.366

O	15.9994	¹⁶O	15.994915	99.762
		¹⁷O	16.999131	0.038
		¹⁸O	17.999159	0.200

F	18.998403	¹⁹F	18.998403	100

Na	22.98977	²³Na	22.989770	100

Si	28.0855	²⁸Si	27.976928	92.23
		²⁹Si	28.976496	4.67
		³⁰Si	29.973772	3.10

P	30.973763	³¹P	30.973763	100

S	32.066	³²S	31.972072	95.02
		³³S	32.971459	0.75
		³⁴S	33.967868	4.21
		³⁶S	35.967079	0.02

Cl	35.4527	³⁵Cl	34.968853	75.77
Cl	35.4527	³⁷Cl	36.965903	24.23

K	39.0983	³⁹K	38.963708	93.2581
		⁴⁰K	39.963999	0.0117
		⁴¹K	40.961825	6.7302

Br	79.904	⁷⁹Br	78.918336	50.69
Br	79.904	⁸¹Br	80.916290	49.31

I	126.904477	¹²⁷I	126.904477	100

Cs	132.905433	¹³³Cs	132.905433	100