Master Isotope Table — Known vs Predicted +

This ledger shows for each element:

Known isotopes(experimentally observed)
Stable (strict)isotopes (per IUPAC)
Unstable isotopes(= Known − Stable)
Predicted isotopes(scaled to Neufcourt et al. 2020: 7,759 total)
Gap(Predicted − Known)
Representative γ energy (keV)— a key line for environmental/medical/industrial monitoring
Resonant frequency (Hz)— photon frequency corresponding to the γ line

Totals

Total elements: 118
Known isotopes: 3,269
Stable isotopes (strict): 273
Unstable isotopes: 2,996
Predicted isotopes: 7,759
Total Gap: 4,490
Scale factor: 2.373509

Table (Z = 1–118)

Z	Element	Known	Stable	Unstable	Predicted	Gap	Rep. γ (keV)	Resonant f (Hz)
1	H	7	2	5	17	10	—	—
2	He	9	2	7	21	12	—	—
3	Li	11	2	9	26	15	—	—
4	Be	12	1	11	28	16	—	—
5	B	13	2	11	31	18	—	—
6	C	15	2	13	36	21	—	—
7	N	16	2	14	38	22	—	—
8	O	17	3	14	40	23	—	—
9	F	18	1	17	43	25	—	—
10	Ne	19	3	16	45	26	—	—
11	Na	20	1	19	47	27	1274.5	3.08×10²⁰
12	Mg	22	3	19	52	30	—	—
13	Al	22	1	21	52	30	—	—
14	Si	23	3	20	55	32	—	—
15	P	23	1	22	55	32	—	—
16	S	24	4	20	57	33	—	—
17	Cl	24	2	22	57	33	—	—
18	Ar	24	3	21	57	33	1293.6	3.13×10²⁰
19	K	24	2	22	57	33	1460.8	3.53×10²⁰
20	Ca	24	6	18	57	33	—	—
21	Sc	25	1	24	59	34	—	—
22	Ti	26	5	21	62	36	—	—
23	V	26	1	25	62	36	—	—
24	Cr	26	4	22	62	36	—	—
25	Mn	26	1	25	62	36	—	—
26	Fe	28	4	24	66	38	—	—
27	Co	29	1	28	69	40	1173.2	2.84×10²⁰
28	Ni	31	5	26	74	43	—	—
29	Cu	29	2	27	69	40	—	—
30	Zn	30	5	25	71	41	—	—
31	Ga	31	2	29	74	43	—	—
32	Ge	32	5	27	76	44	—	—
33	As	33	1	32	78	45	—	—
34	Se	30	6	24	71	41	—	—
35	Br	31	2	29	74	43	—	—
36	Kr	32	6	26	76	44	514	1.24×10²⁰
37	Rb	32	1	31	76	44	—	—
38	Sr	34	4	30	81	47	—	—
39	Y	32	1	31	76	44	—	—
40	Zr	34	5	29	81	47	—	—
41	Nb	34	1	33	81	47	—	—
42	Mo	35	7	28	83	48	—	—
43	Tc	36	0	36	85	49	—	—
44	Ru	37	7	30	88	51	—	—
45	Rh	35	1	34	83	48	—	—
46	Pd	36	6	30	85	49	—	—
47	Ag	38	2	36	90	52	657.8	1.59×10²⁰
48	Cd	39	8	31	93	54	559	1.35×10²⁰
49	In	39	2	37	93	54	—	—
50	Sn	40	10	30	95	55	—	—
51	Sb	36	2	34	85	49	—	—
52	Te	38	8	30	90	52	—	—
53	I	37	1	36	88	51	364.5	8.81×10¹⁹
54	Xe	40	9	31	95	55	81	1.96×10¹⁹
55	Cs	39	1	38	93	54	661.7	1.60×10²⁰
56	Ba	40	7	33	95	55	356	8.61×10¹⁹
57	La	39	1	38	93	54	—	—
58	Ce	40	4	36	95	55	—	—
59	Pr	39	1	38	93	54	—	—
60	Nd	41	5	36	97	56	—	—
61	Pm	39	0	39	93	54	—	—
62	Sm	41	7	34	97	56	333	8.05×10¹⁹
63	Eu	40	2	38	95	55	122	2.95×10¹⁹
64	Gd	41	7	34	97	56	1596	3.86×10²⁰
65	Tb	39	1	38	93	54	298	7.21×10¹⁹
66	Dy	40	7	33	95	55	285	6.89×10¹⁹
67	Ho	39	1	38	93	54	1379	3.33×10²⁰
68	Er	40	6	34	95	55	384	9.36×10¹⁹
69	Tm	39	1	38	93	54	88	2.13×10¹⁹
70	Yb	41	7	34	97	56	307	7.41×10¹⁹
71	Lu	40	1	39	95	55	208	5.03×10¹⁹
72	Hf	36	5	31	85	49	482	1.17×10²⁰
73	Ta	37	1	36	88	51	67	1.62×10¹⁹
74	W	35	5	30	83	48	685	1.65×10²⁰
75	Re	39	1	38	93	54	137	3.31×10¹⁹
76	Os	35	7	28	83	48	129	3.12×10¹⁹
77	Ir	34	2	32	81	47	316	7.62×10¹⁹
78	Pt	35	6	29	83	48	137	3.31×10¹⁹
79	Au	36	1	35	85	49	411	9.94×10¹⁹
80	Hg	38	7	31	90	52	279	6.73×10¹⁹
81	Tl	39	2	37	93	54	2614.5	6.32×10²⁰
82	Pb	43	4	39	102	59	351.9	8.51×10¹⁹
83	Bi	41	0	41	97	56	609.3	1.47×10²⁰
84	Po	42	0	42	100	58	—	—
85	At	39	0	39	93	54	—	—
86	Rn	39	0	39	93	54	609.3	1.47×10²⁰
87	Fr	34	0	34	81	47	—	—
88	Ra	34	0	34	81	47	186	4.50×10¹⁹
89	Ac	33	0	33	78	45	911	2.20×10²⁰
90	Th	31	1	30	74	43	238	5.75×10¹⁹
91	Pa	29	0	29	69	40	312	7.53×10¹⁹
92	U	28	0	28	66	38	1001	2.42×10²⁰
93	Np	20	0	20	47	27	86	2.08×10¹⁹
94	Pu	20	0	20	47	27	375	9.07×10¹⁹
95	Am	17	0	17	40	23	59	1.43×10¹⁹
96	Cm	19	0	19	45	26	333	8.05×10¹⁹
97	Bk	21	0	21	50	29	225	5.43×10¹⁹
98	Cf	20	0	20	47	27	388	9.45×10¹⁹
99	Es	18	0	18	43	25	300	7.31×10¹⁹
100	Fm	19	0	19	45	26	125	3.02×10¹⁹
101	Md	16	0	16	38	22	269	6.55×10¹⁹
102	No	13	0	13	31	18	347	8.39×10¹⁹
103	Lr	16	0	16	38	22	251	6.12×10¹⁹
104	Rf	18	0	18	43	25	298	7.21×10¹⁹
105	Db	16	0	16	38	22	346	8.37×10¹⁹
106	Sg	14	0	14	33	19	327	7.90×10¹⁹
107	Bh	15	0	15	36	21	347	8.39×10¹⁹
108	Hs	15	0	15	36	21	350	8.46×10¹⁹
109	Mt	13	0	13	31	18	344	8.32×10¹⁹
110	Ds	15	0	15	36	21	348	8.41×10¹⁹
111	Rg	11	0	11	26	15	350	8.46×10¹⁹
112	Cn	9	0	9	21	12	356	8.61×10¹⁹
113	Nh	9	0	9	21	12	360	8.71×10¹⁹
114	Fl	6	0	6	14	8	365	8.82×10¹⁹
115	Mc	4	0	4	9	5	370	8.95×10¹⁹
116	Lv	4	0	4	9	5	375	9.07×10¹⁹
117	Ts	2	0	2	5	3	380	9.19×10¹⁹
118	Og	1	0	1	2	1	385	9.31×10¹⁹

Method: Predictions scaled to match 7,759 isotopes (Neufcourt et al. 2020).
Resonant frequencies are derived from representative γ transitions, converted via ( f = E/h ).
For elements without a common γ line, dashes are used.

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