Isotope lists, 97+

For an overview of available graphical representations, see Table of nuclides.

The tables listed below provide information on the basic properties of all nuclides.

Click an element in the below periodic table to go directly to the table of nuclides for that element.

Isotopes of the chemical elements
1
H		 2
He
3
Li		 4
Be		 5
B		 6
C		 7
N		 8
O		 9
F		 10
Ne
11
Na		 12
Mg		 13
Al		 14
Si		 15
P		 16
S		 17
Cl		 18
Ar
19
K		 20
Ca		 21
Sc		 22
Ti		 23
V		 24
Cr		 25
Mn		 26
Fe		 27
Co		 28
Ni		 29
Cu		 30
Zn		 31
Ga		 32
Ge		 33
As		 34
Se		 35
Br		 36
Kr
37
Rb		 38
Sr		 39
Y		 40
Zr		 41
Nb		 42
Mo		 43
Tc		 44
Ru		 45
Rh		 46
Pd		 47
Ag		 48
Cd		 49
In		 50
Sn		 51
Sb		 52
Te		 53
I		 54
Xe
55
Cs		 56
Ba		 * 72
Hf		 73
Ta		 74
W		 75
Re		 76
Os		 77
Ir		 78
Pt		 79
Au		 80
Hg		 81
Tl		 82
Pb		 83
Bi		 84
Po		 85
At		 86
Rn
87
Fr		 88
Ra		 ** 104
Rf		 105
Db		 106
Sg		 107
Bh		 108
Hs		 109
Mt		 110
Ds		 111
Rg		 112
Cn		 113
Uut		 114
Fl		 115
Uup		 116
Lv		 117
Uus		 118
Uuo
* 57
La		 58
Ce		 59
Pr		 60
Nd		 61
Pm		 62
Sm		 63
Eu		 64
Gd		 65
Tb		 66
Dy		 67
Ho		 68
Er		 69
Tm		 70
Yb		 71
Lu
** 89
Ac		 90
Th		 91
Pa		 92
U		 93
Np		 94
Pu		 95
Am		 96
Cm		 97
Bk		 98
Cf		 99
Es		 100
Fm		 101
Md		 102
No		 103
Lr
  • Table of nuclides
  • Categories: Isotopes
  • Tables of nuclides
  • Metastable isotopes
  • Isotopes by element


Legend

α Alpha decay
β- Beta decay
β+ Positron emission
K+ Electron capture
IT Internal conversion
SF Spontaneous fission
p Proton emission
n Neutron emission

Berkelium

Main article: Isotopes of berkelium

Isotope Half-life Spin Parity Mode(s) or Abundance
238Bk 144 s %K+%β+=100, %KSF=0.048
239Bk (7/2+ )
240Bk 4.8 m %K+%β+=100, %KSF=1E-3 sys
241Bk (7/2+ )
242Bk 7.0 m %K+%β+=100
242m1Bk 9.5 ns
242m2Bk 0.60 μs
243Bk 4.5 h (3/2- ) %K ~ 99.85, %α ~ 0.15
243m1Bk 5 ns
244Bk 4.35 h (1- ) %K=99.994, %α=0.006
245Bk 4.94 d 3/2- %K=99.88, %α=0.12
245m1Bk 2 ns
246Bk 1.80 d 2(-) %K=100, %α<0.2 sys
247Bk 1380 a (3/2- ) %α < 100
248Bk 9 a (6+) %α>70
248m1Bk 23.7 h 1(-) %β-=70, %K=30, %α<0.001
249Bk 320 d 7/2+ %β-=99.99855, %α=0.00145, %SF=4.76E-8
250Bk 3.217 h 2- %β-=100
251Bk 55.6 m (3/2- ) %β-=100, %α ~ 1E-5

Californium

Main article: Isotopes of californium

Isotope Half-life Spin Parity Mode(s) or Abundance
237Cf 2.1 s %SF ~ 10 sys
238Cf 21 ms 0+ %SF ~ 100 sys
239Cf 39 s %α=?
240Cf 1.06 m 0+ %α=87, %SF ~ 13
241Cf 3.78 m %K ~ 75, %α ~ 25
242Cf 3.49 m 0+ %α=65, %SF < 1.4E-2
243Cf 10.7 m (1/2+ ) %K ~ 86, %α ~ 14
244Cf 19.4 m 0+ %α=70
245Cf 45.0 m (5/2+ ) %K=64, %α=36
246Cf 35.7 h 0+ %α=99.9996, %SF=2.3E-4, %K<5E-4
246m1Cf 45 ns
247Cf 3.11 h (7/2+ ) %K=99.965, %α=0.035
248Cf 333.5 d 0+ %α=99.9971, %SF=0.0029
249Cf 351 a 9/2- %α=100, %SF=4.4E-7
250Cf 13.08 a 0+ %α=99.923, %SF=0.077
251Cf 898 a 1/2+ %α=100
252Cf 2.645 a 0+ %α=96.908, %SF=3.092
253Cf 17.81 d (7/2+ ) %β-=99.69, %α=0.31
254Cf 60.5 d 0+ %SF=99.69, %α=0.31
255Cf 85 m (9/2+ ) %β-=100
256Cf 12.3 m 0+ %SF=100, %β-<1 sys %α ~ 1E-6 sys

Einsteinium

Main article: Isotopes of einsteinium

Isotope Half-life Spin Parity Mode(s) or Abundance
241Es 9 s %α=100
242Es 40 s %α ~ 100, %KSF=1.4
243Es 21 s %K < 70, %α > 30
244Es 37 s %K=96, %α=4, %KSF=0.01 sys
245Es 1.1 m (3/2- ) %K=60, %α=40
246Es 7.7 m (4-,6+) %K=90.1, %α=9.9, %KSF=0.003 sys
247Es 4.55 m (7/2+ ) %K ~ 93, %α ~ 7
248Es 27 m (2-,0+ ) %K>99, %α ~ 0.25, %KSF=3E-5 sys
249Es 102.2 m 7/2(+) %K=99.43, %α=0.57
250Es 8.6 h (6+) %K > 97, %α < 3 sys
250m1Es 2.22 h 1(-) %K > 99, %α < 1 sys
251Es 33 h (3/2- ) %K=99.51, %α=0.49
252Es 471.7 d (5-) %α=76, %K=24, %β- ~ 0.01
253Es 20.47 d 7/2+ %α=100, %SF=8.9E-6
254Es 275.7 d (7+) %α=100, %K<1E-4, %β-=1.74E-6, %SF<3E-6
254m1Es 39.3 h 2+ %β-=98, %α=0.33, %IT<3, %K=0.078, %SF<0.045
255Es 39.8 d (7/2+ ) %β-=92.0, %α=8.0, %SF=0.0045
256Es 25.4 m (1+ ) %β-=100
256m1Es 7.6 h (8+) %β- ~ 100, %β-SF=0.002

Fermium

Main article: Isotopes of fermium

Isotope Half-life Spin Parity Mode(s) or Abundance
242Fm 0.8 ms 0+ %SF=100
243Fm 0.18 s %α < 100, %SF < 0.5, %K=?
244Fm 3.3 ms 0+ %SF=100
245Fm 4.2 s %α=100, %SF < 0.11
246Fm 1.1 s 0+ %α=92, %SF=7.3, %K<1 sys
247Fm 35 s %α > 50, %K+%β+ < 50
247m1Fm 9.2 s %α < 100
248Fm 36 s 0+ %α=93, %K ~ 7, %SF=0.10
249Fm 2.6 m (7/2+ ) %K ~ 85 sys %α ~ 15 sys
250Fm 30 m 0+ %α>90, %K<10, %SF=0.0069
250m1Fm 1.8 s %IT>80, %SF < 8E-5
251Fm 5.30 h (9/2- ) %K=98.20, %α=1.80
252Fm 25.39 h 0+ %α=99.9977, %SF=0.00232
253Fm 3.00 d 1/2+ %K=88, %α=12
254Fm 3.240 h 0+ %α=99.9408, %SF=0.0592
255Fm 20.07 h 7/2+ %α=100, %SF=2.3E-5
256Fm 157.6 m 0+ %SF=91.9, %α=8.1
257Fm 100.5 d (9/2+ ) %α=99.790, %SF=0.210
258Fm 370 μs 0+ %SF=100
259Fm 1.5 s %SF=100

Mendelevium

Main article: Isotopes of mendelevium

Isotope Half-life Spin Parity Mode(s) or Abundance
245Md 0.35 s (7/2) %α=100
245m1Md 0.90 ms (1/2- )
246Md 1.0 s %α=100
247Md 1.12 s %α=80, %SF=20
248Md 7 s %K=80, %α=20, %SF < 0.05
249Md 24 s %K=80, %α=20
250Md 52 s %K=93, %α=7, %KSF=0.02 sys
251Md 4.0 m %K > 90, %α < 10
252Md 2.3 m %K>50, %α<50
253Md 6 m %K+%β+=100
254Md 10 m %K < 100
254m1Md 28 m %K < 100
255Md 27 m (7/2- ) %K=92, %α=8, %SF < 1.4
256Md 78.1 m (0-,1- ) %K=90.7, %α=9.3, %SF < 2.8
257Md 5.52 h (7/2- ) %K=85, %α=15, %SF<1
258Md 51.5 d (8-) %α=100, %SF < 0.003, %β- < 0.003, %K < 0.003
258m1Md 57.0 m (1- ) %K > 70, %SF < 30, %α < 1.2, %β- < 30
259Md 96 m (7/2- ) %SF ~ 100, %α<1.3
260Md 27.8 d %SF>73, %α < 25, %β- < 10

Nobelium

Main article: Isotopes of nobelium

Isotope Half-life Spin Parity Mode(s) or Abundance
250No 0.25 ms 0+ %SF=100, %α ~ 0.05 sys
251No 0.8 s %α ~ 100, %K ~ 1 sys%SF < 8
252No 2.30 s 0+ %α=73.1, %SF=26.9
253No 1.7 m (9/2- ) %α ~ 80, %K ~ 20 sys
254No 55 s 0+ %α=90, %K=10, %SF=0.17
254m1No 0.28 s %IT>80
255No 3.1 m (1/2+ ) %α=61.4, %K=38.6
256No 2.91 s 0+ %α=99.5, %SF=0.53 +8-4
257No 25 s (7/2+ ) %α ~ 100
258No 1.2 ms 0+ %SF=100, %α ~ 1E-3 sys
259No 58 m (9/2+ ) %α=75, %K=25, %SF<10
260No 106 ms 0+ %SF=100
261No
262No 5 ms 0+ %SF=?

Lawrencium

Main article: Isotopes of lawrencium

Isotope Half-life Spin Parity Mode(s) or Abundance
253Lr 1.3 s %α=98, %K ~ 1 sys%SF < 1
254Lr 13 s %α=78, %K=22, %SF < 0.16
255Lr 22 s %α=85, %K<30, %SF<0.10
256Lr 28 s %α>80, %K<20, %SF<0.026
257Lr 0.646 s (9/2+ ) %α=100, %SF < 6.5E-4
258Lr 3.9 s %α>95, %K<5, %SF < 5.0
259Lr 6.3 s %α=77, %SF=23, %K<0.5
260Lr 180 s %α=75, %K=25
261Lr 39 m %SF < 100
262Lr 216 m %SF<10

Rutherfordium

Main article: Isotopes of rutherfordium

Isotope Half-life Spin Parity Mode(s) or Abundance
253Rf 1.8 s %SF ~ 50, %α ~ 50
253m1Rf 50 μs
254Rf 0.5 ms 0+ %SF=100, %α ~ 0.3 sys
254m1Rf 23 μs
255Rf 1.5 s (9/2- ) %SF=52, %α=48
256Rf 6.7 ms 0+ %SF=98 +2- 7, %α=2.2 +73-18
257Rf 4.7 s (7/2+ ) %α=79.6, %K=18, %SF=2.4
258Rf 12 ms 0+ %SF ~ 87, %α ~ 13
259Rf 3.1 s %α=93, %SF=7, %K ~ 0.3
260Rf 20.1 ms 0+ %SF=100
261Rf 65 s %α>80, %SF<10, %K < 10 sys
262Rf 2.1 s 0+ %SF=100
262m1Rf 47 ms [2+ ]

Dubnium

Main article: Isotopes of dubnium

Isotope Half-life Spin Parity Mode(s) or Abundance
255Db 1.6 s %α>47, %SF < 53
256Db 2.6 s %SF < 40, %α ~ 70, %K ~ 10 sys
257Db 1.3 s %α=82, %SF=17, %K=1 sys
258Db 4.4 s %α=67 +5-9, %K=33 +9-5, %SF<34
258m1Db 20 s %K ~ 100
259Db
260Db 1.52 s %α > 90.4, %SF ~ 9.6, %K<2.5
261Db 1.8 s %α>50, %SF<50
262Db 34 s %α ~ 64, %SF ~ 33, %K ~ 3 sys
263Db 27 s %SF=57, %α=43

Seaborgium

Main article: Isotopes of seaborgium

Isotope Half-life Spin Parity Mode(s) or Abundance
258Sg 2.9 ms 0+ %SF=100
259Sg 0.48 s (1/2+ ) %α=90, %SF < 20
260Sg 3.6 ms 0+ %α=50 +30-20, %SF=50 +20-30
261Sg 0.23 s %α=95, %SF<10
262Sg 0+
263Sg 0.8 s %SF ~ 70, %α ~ 30
263m1Sg 0.31 s [9/2+]
264Sg 0+
265Sg 10 s [1/2+ ] %α>50, %SF<50
266Sg 21 s 0+ %α=50, %SF=50

Bohrium

Main article: Isotopes of bohrium

Isotope Half-life Spin Parity Mode(s) or Abundance
261Bh 11.8 ms %α=95, %SF<10
262Bh 102 ms %α > 80, %SF < 20
262m1Bh 8.0 ms %α > 70, %SF < 30
263Bh
264Bh 0.44 s %α=100

Hassium

Main article: Isotopes of hassium

Isotope Half-life Spin Parity Mode(s) or Abundance
264Hs 0.85 ms 0+ %α ~ 100, %SF < 1.5
265Hs 0.9 ms %α=?
265m1Hs 1.55 ms [1/2+ ] %α ~ 100, %SF<9
266Hs 0+
267Hs 26 ms [9/2+ ] %α=100
268Hs 0+
269Hs 9 s [3/2+ ] %α=100

Meitnerium

Main article: Isotopes of meitnerium

Isotope Half-life Spin Parity Mode(s) or Abundance
266Mt 0.8 ms %α=100
266m1Mt 3.8 ms %α=100, %SF < 5.5
267Mt
268Mt 0.07 s [5+,6+] %α=100

Darmstadtium

Main article: Isotopes of darmstadtium

Isotope Half-life Spin Parity Mode(s) or Abundance
267Ds 3 μs [11/2- ] %α=100
268Ds 0+
269Ds 0.17 ms [1/2+ ] %α=100
270Ds 0+
271Ds 0.06 s [3/2+ ] %α=100
271m1Ds 1.1 ms [9/2+ ] %α=100
272Ds 0+
273Ds 0.18 ms [3/2+ ] %α=100
273m1Ds 120 ms [13/2- ] %α=100

Roentgenium

Main article: Isotopes of roentgenium

Isotope Half-life Spin Parity Mode(s) or Abundance
272Rg 1.5 ms [5+,6+] %α=100

Copernicium

Main article: Isotopes of copernicium

Isotope Half-life Spin Parity Mode(s) or Abundance
277Cn 0.24 ms [3/2+ ]

Ununtrium

Main article: Isotopes of ununtrium

nuclide
symbol		 Z(p) N(n)  
isotopic mass (u)
 		 half-life nuclear
spin		 representative
isotopic
composition
(mole fraction)		 range of natural
variation
(mole fraction)
excitation energy
278Uut 113 165
282Uut 113 169 73 ms
283Uut 113 170 283.17645(78)# 100(+490-45) ms
284Uut 113 171 284.17808(86)# 0.48(+58-17) s
285Uut 113 172 285.17873(105)# 2# min
286Uut 113 173 286.18048(101)# 5# min
287Uut 113 174 287.18105(90)# 20# min

Flerovium

Main article: Isotopes of flerovium

Isotope Half-life Spin Parity Mode(s) or Abundance
285Fl 0.58 ms %α=?

Ununpentium

Main article: Isotopes of ununpentium

nuclide
symbol		 Z(p) N(n)  
isotopic mass (u)
 		 half-life nuclear
spin		 representative
isotopic
composition
(mole fraction)		 range of natural
variation
(mole fraction)
excitation energy
287Uup 115 172 287.19119(85)# 32(+155-14) ms
288Uup 115 173 288.19249(92)# 87(+105-30) ms
289Uup 115 174 289.19272(110)# 10# s
290Uup 115 175 290.19414(106)# 10# s
291Uup 115 176 291.19438(95)# 1# min

Livermorium

Main article: Isotopes of livermorium

nuclide
symbol		 Z(p) N(n)  
isotopic mass (u)
 		 half-life nuclear
spin		 representative
isotopic
composition
(mole fraction)		 range of natural
variation
(mole fraction)
excitation energy
289Lv 116 173 289.19886(117)# 10# ms 5/2+#
290Lv 116 174 290.19859(91)# 15(+26-6) ms 0+
291Lv 116 175 291.20001(91)# 6.3(+116-25) ms
292Lv 116 176 292.19979(92)# 18.0(+16-6) ms 0+
293Lv 116 177 61(+57-20) ms
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