List of isotopes / from ordinal number 101

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The list of isotopes is the overview page for easy access to all elements. The structure is also explained there and the legend for the table can also be found there. Decay energies were recalculated with the given masses and the mass-energy equivalent of . ${\displaystyle \textstyle \Delta m=931{,}4940954{\frac {\mathrm {MeV} }{\mathrm {u} }}}$

₁₀₁ Mendelevium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
245 billion	0.35 s		(7/2)	α
245m1 Md	0.90 ms		(1 / 2−)
246 Md	1.0 s			α
247 Md	1.12 s	8.82 (α)		α = 80, SF = 20
248 Md	7 s	5.25 (ε), 8.7 (α)		ε = 80, α = 20, SF <0.05
249 Md	24 s	3.7 (ε), 8.46 (α)		ε = 80, α = 20
250 billion	52 p	4.6 (ε), 8.31 (α)		ε = 93, α = 7, εSF = 0.02
251 billion	4.0 min	3.07 (ε), 8.02 (α)		ε> 90, α <10
252 billion	2.3 min	3.89 (ε)		ε> 50, α <50
253 billion	6 min	1.96 (εβ + )		εβ +
254 billion	10 min	2.68		ε <100
254m1 Md	28 min			ε <100
255 billion	27 min	1.043 (ε), 7.907 (α)	(7 / 2−)	ε = 92, α = 8, SF <1.4
256 billion	78.1 min	2.13 (ε), 7.897 (α)	(0−, 1−)	ε = 90.7, α = 9.3, SF <2.8
257 Md	5.52 h	0.406 (ε), 7.271 (α)	(7 / 2−)	ε = 85, α = 15, SF <1
258 billion	51.5 d	7.271 (α), 1.23 (ε)	(8−)	α ≈ 100, SF <0.003, β - <0.003, ε <0.003
258m1 Md	57.0 min	1.23 (ε), 7.271 (α)	(1−)	ε> 70, SF <30, α <1.2, β - <30
259 Md	96 min	7.1 (α)	(7 / 2−)	SF ≈ 100, α <1.3
260 billion	27.8 d	7.0 (α), 1.0 (β - )		SF> 73, α <25, β - <10

₁₀₂ Nobelium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
250 No.	0.25 ms	9.0 (α)	0+	SF ≈ 100, α ≈ 0.05
251 No.	0.8 s	8.89 (α), 3.78 (ε)		α ≈ 100, ε ≈ 1, SF <8
252 no	2.30 s	8.549 (α)	0+	α = 73.1, SF = 26.9
253 no	1.7 min	8.44 (α), 3.2 (ε)	(9 / 2−)	α ≈ 80, ε ≈ 20
254 No.	55 s	8.226 (α), 1.14 (ε)	0+	α ≈ 100, ε = 10, SF = 0.17
254m1 No.	0.28 s	0.50 (IT)		IT> 80
255 No.	3.1 min	8.445 (α), 2.012 (ε)	(1/2 +)	α = 61.4, ε = 38.6
256 No.	2.91 s	8.581 (α)	0+	α ≈ 100, SF = 0.53 ${\displaystyle \left.^{+8}_{-4}\right.}$
257 no	25 s	8.45 (α)	(7/2 +)	α ≈ 100
258 No.	1.2 ms	8.2 (α)	0+	SF ≈ 100, α ≈ 1 · 10 −3
259 no	58 min	7.91 (α), 0.5 (ε)	(9/2 +)	α ≈ 100, ε = 25, SF <10
260 No.	106 ms		0+	SF
261 No.
262 No.	5 ms		0+	SF =?

₁₀₃ Lawrencium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
252 Lr	0.4 s	9.15		α ≈ 100
253 Lr	0.6 s	8.99 (α)		α> 80, SF <20
253m1 Lr	1.5 s	8.99 (α), 4.3 (ε)		α = 98, ε ≈ 1, SF <1
254 Lr	13 s	8.75 (α), 5.2 (ε)		α = 78, ε = 22, SF <0.16
255 Lr	22 s	8.62 (α), 3.24 (ε)		α = 85, ε <30, SF <0.10
256 Lr	28 p	8.88 (α), 4.19 (ε)		α> 80, ε <20, SF <0.026
257 Lr	0.646 s	9.01 (α)	(9/2 +)	α ≈ 100, SF <6.5 · 10 −4
258 Lr	3.9 s	8.90 (α), 3.38 (ε)		α> 95, ε <5, SF <5
259 Lr	6.3 s	8.67 (α), 1.81 (ε)		α = 77, SF = 23, ε <0.5
260 Lr	180 s	8.31 (α), 2.74 (ε)		α = 75, ε = 25
261 Lr	39 min			SF <100
262 Lr	216 min	2.1 (ε)		ε> 10, SF <10

₁₀₄ rutherfordium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
253 Rf	1.8 s	9.5 (α)		SF ≈ 50, α ≈ 50
253m1 Rf	48 µs			SF ≈ 100
254 Rf	0.5 ms	9.3 (α)	0+	SF = 100, α ≈ 0.3
254m1 Rf	22.3 µs			SF ≈ 100
255 Rf	1.5 s	9.3 (α)	(9 / 2−)	SF = 52, α = 48
256 Rf	6.7 ms	8.952 (α)	0+	SF = 97.8 , α = 2.2 ${\displaystyle \left.^{+18}_{-73}\right.}$ ${\displaystyle \left.^{+73}_{-18}\right.}$
257 Rf	4.7 s	9.25 (α), 3.4 (ε)	(7/2 +)	α ≈ 79.6, ε = 18, SF = 2.4
258 Rf	12 ms	9.25 (α)	0+	SF ≈ 87, α ≈ 13
259 Rf	3.1 s	9.11 (α)		α ≈ 93, SF = 7, ε ≈ 0.3
260 Rf	20.1 ms	9.00 (α), 2.45 (ε)	0+	SF
261 Rf	4.2 s	8.81 (α), 1.8 (ε)		α> 80, SF <10, ε <10
261m1 Rf	78 p			α ≈ 100
262 Rf	2.1 s		0+	SF
262m1 Rf	47 ms		(2+)
263 Rf	15 minutes			SF
267 Rf	1.3 h			SF
268 Rf			0+	SF

₁₀₅ Dubnium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
255 Db	1.6 s	9.6 (α)		α> 47, SF <53
256 Db	2.6 s	9.5 (α)		SF <40, α ≈ 70, ε ≈ 10
257 Db	1.3 s	9.31 (α), 4.3 (ε)		α = 82, SF = 17, ε = 1
257m1 Db	0.8 s			α ≈ 100
258 Db	4.4 s	9.55 (α), 5.5 (ε)		α = 67 , ε = 33 , SF <34 ${\displaystyle \left.^{+5}_{-6}\right.}$ ${\displaystyle \left.^{+9}_{-5}\right.}$
258m1 Db	20 s			ε ≈ 100
259 Db	0.51 s			α ≈ 100
260 db	1.52 s	9.37 (α), 4.6 (ε)		α> 90.4, SF ≈ 9.6, ε <2.5
261 Db	1.8 s	9.27 (α)		α> 50, SF <50
262 Db	34 p	9.21 (α), 4.0 (ε)		α ≈ 64, SF ≈ 33, ε ≈ 3
263 Db	27 p	9.03 (α)		SF = 57, α = 43
267 Db	1.2 h			SF ≈ 100
268 Db	16 h			SF ≈ 100

₁₀₆ seaborgium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
258 Sg	2.9 ms		0+	SF
259 Sg	0.48 s	9.87 (α)	(1/2 +)	α = 90, SF <20
260 Sg	3.6 ms	9.92 (α)	0+	α = 50 , SF = 50 ${\displaystyle \left.^{+30}_{-20}\right.}$ ${\displaystyle \left.^{+20}_{-30}\right.}$
261 Sg	0.23 s	9.81 (α)		α = 95, SF <10
262 Sg	6.9 ms		0+	SF
263 Sg	0.8 s	9.59 (α)		SF ≈ 70, α ≈ 30
263m1 Sg	0.31 s		(9/2 +)	α ≈ 100
264 Sg			0+
265 Sg	10 s	9.2 (α)	(1/2 +)	α> 50, SF <50
266 Sg	21 s	9.1 (α)	0+	α = 50, SF = 50
271 Sg	2.4 min			α> 50, SF <50

₁₀₇ Bohrium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
260 operating hours		10.0		α =?
261 operating hours	11.8 ms	10.56 (α)		α = 95, SF <10
262 hours	102 ms	10.42 (α)		α> 80, SF <20
262m1 Bh	8.0 ms			α> 70, SF <30
263 hours
264 operating hours	0.44 s			α
265 operating hours	0.94 s ${\displaystyle \left.^{+0{,}70}_{-0{,}31}\right.}$	9.24 ± 0.05 (α)		α
266 operating hours	1.7 s			α
267 hours	17 s			α
271 hours				α
272 hours	9.8 s			α

₁₀₈ Hassium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
263 Hs	1 ms	10.73 (α), 5.18 (ε)	7/2 +	α ≈ 100, SF	263.128480
264 Hs	≈0.8 ms	10.59 (α), 3.51 (ε)	0+	α ≈ 50, SF ≈ 50	264.128360
265 Hs	2 ms	10.47 (α)	(9/2 +)	α ≈ 100, SF ≤ 1	265.129792
265m1 Hs	0.75 ms		(1/2 +)	α ≈ 100, SF ≤ 1
266 Hs	2.3 ms	10.346 (α)	0+	α ≈ 100, SF ≤ 1	266.130050
267 Hs	52 ms	10.038 (α)	(9/2 +)	α ≥ 80, SF <20	267.131670
267m Hs	800 ms			α
268 Hs	2 s	9.897 (α)	0+	α ≈ 100, SF> 0	268.13216
269 Hs	9.7 s	9.340 (α)	(3/2 +)	α ≈ 100	269.133720
270 ms	3.6 s	9.070 (α)	0+	α ≈ 100	270.134310
271 Hs	40 s	9.9 (α)	(3/2 +)	α, SF	271.13766
273 Hs	0.76 s	9.70 (α)		α ≈ 100	273.141590
275 Hs	0.15 s	9.44 (α)	(3/2 +)	α ≈ 100	275.146670
277 Hs	3 ms	9.05 (α)	(3/2 +)	SF ≈ 100	277.151900
277m Hs	34 p			SF ≈ 100
278 Hs	11 min	?	0+	SF

₁₀₉ meitnerium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
266 Mt	1.7 ms	11.269		α ≈ 100, SF> 0
266m1 Mt	3.8 ms			α ≈ 100, SF <5.5
267 Mt
268 Mt	0.07 s	10.73	(5+, 6+)	α
270 Mt	5.0 ms	10.35		α
274 m	20 s	10.5		α
275 mt	9.7 ms	10.1		α
276 Mt	0.72 s	9.8		α
278 Mt	30 min	9.1		α

₁₁₀ Darmstadtium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
267 Ds	2.8 µs	12.3	(11 / 2−)	α
268 Ds			0+
269 Ds	0.179 ms	11.6	(3/2 +)	α
270 Ds	6.0 ms	11.2	0+	α = 99.9, SF = 0.1
270m1 Ds	0.1 ms			α
271 Ds	56 ms	10.9	(3/2 +)	α
271m1 Ds	1.1 ms		(9/2 +)	α
272 Ds			0+
273 Ds	0.17 ms	11.4	(3/2 +)	α
273m1 Ds	120 ms		(13 / 2−)	α
279 Ds	0.18 s	9.6	(7/2 +)	SF ≈ 90, α ≈ 10
280 Ds	11 s	9.3	0+	α
281 Ds	9.6 s	9.0	(3/2 +)	SF ≈ 100, α> 0
282 Ds	1.1 min		0+	α

₁₁₁ Roentgenium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
272 Rg	3.8 ms	11.44	(5+, 6+)	α
274 Rg	6.4 ms	11.6		α
278 Rg	4.2 ms	10.7		α ≈ 100, SF> 0
279 Rg	170 ms	10.5		α
280 Rg	3.6 s	10.0		α
281 Rg	1 min			SF
282 Rg	4 min	9.4		α, SF

₁₁₂ Copernicium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
277 cn	0.69 ms	11.62	(3/2 +)	α ≈ 100, SF> 0
278 cn	10 ms	11.38	0+	α, SF
279 cn	100 ms	10.96		α, SF
280 cn	1 s	10.62	0+	α, SF
281 cn	10 s	10.29	(3/2 +)	α, SF
282 cn	0.05 ms		0+	SF
283 cn	4 s	9.62 (α)		α> 90, SF <10
284 cn	101 ms		0+	SF
285 cn	34 p	8.79		α

₁₁₃ Nihonium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
278 Nh	0.24 ms	11.8	0	α
282 Nh	73 ms	10.0		α
283 Nh	100 ms	10.6		α
284 Nh	0.48 s	10.3		α
285 Nh	2 min	10.0		α, SF
286 Nh	5 min	9.7	0	α ≈ 100, SF> 0
287 Nh	20 min	9.3		α, SF

₁₁₄ Flerovium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
285 bottles	5 s	11 (α)	(3/2 +)	α, SF
286 bottles	0.16 s	10.7 (α)	0+	α ≈ 40, SF ≈ 60
287 bottles	0.51 s	10.44	(3/2 +)	α
288 bottles	0.8 s	9.97	0+	α
289 bottles	2.7 s	9.85	(3/2 +)	α

₁₁₅ Moscovium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
287 Mc	32 ms	11.3 (α)		α
288 Mc	87 ms	11.0 (α)		α
289 Mc	220 ms	10.6 (α)		α ≈ 100, SF> 0
290 Mc	16 ms	10.3 (α)		SF ≈ 100, α> 0

₁₁₆ Livermorium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
290 Lv	15 ms	11.0	0+	α
291 Lv	6.3 ms	10.89		α
292 Lv	18 ms	10.8	0+	α
293 Lv	53 ms	10.67		α

₁₁₇ Tenness

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
291 Ts	10 ms	11.9 (α)		α, SF
292 Ts	50 ms	11.6 (α)		α, SF
293 Ts	14 ms	11.03 (α)		α
294 Ts	78 ms	10.81 (α)		α, SF

₁₁₈ Oganesson

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	Mass (u)
294 Og	0.89 ms	11.65 (α)	0+	α

swell

See also list of isotopes # web links