Isotop nobelium

**[[Nobelium]]** (**<sub>102</sub>No**) adalah  sebuah unsur buatan, sehingga berat atom standarnya tidak dapat diberikan. Seperti semua unsur buatan, ia tidak memiliki satu pun isotop stabil. Isotop pertama nobelium yang disintesis (dan diidentifikasi dengan benar) adalah 254No pada tahun 1966. Ada 13 radioisotop yang diketahui, mulai dari 249No hingga 260No dan 262No, dan 5 isomer, 249mNo, 250mNo, 251mNo, 253mNo, dan 254mNo. Isotop yang berumur paling panjang adalah 259No dengan waktu paruh 58 menit. Isomer yang berumur paling panjang adalah 251mNo dengan waktu paruh 1,7 detik.

## Daftar isotop

|-
| rowspan=2|249No
| rowspan=2 style="text-align:right" | 102
| rowspan=2 style="text-align:right" | 147
| rowspan=2|249,0878(3)#
| rowspan=2|38,3(28) mdtk
| α 
| 245Fm
| rowspan=2|5/2+
|-
| SF (249mNo
| colspan="3" style="text-indent:2em" | ~125&nbsp;keV
| 
|
|
| 1/2+
|-
| rowspan=3|250No
| rowspan=3 style="text-align:right" | 102
| rowspan=3 style="text-align:right" | 148
| rowspan=3|250,08756(22)#
| rowspan=3|5,7(8)&nbsp;μdtk
| SF (99,95%)
| (beberapa)
| rowspan=3|0+
|-
| α(0,05%)
| 246Fm
|-
| β<sup>+</sup> (2,5%)
| 250Md
|-
| style="text-indent:1em" | 250mNo
| colspan="3" style="text-indent:2em" | 
| 36(3)&nbsp;μdtk
| SF
| (beberapa)
| 
|-
| rowspan=3|251No
| rowspan=3 style="text-align:right" | 102
| rowspan=3 style="text-align:right" | 149
| rowspan=3|251,08894(12)#
| rowspan=3|0,78(2)&nbsp;dtk
| α (89%)
| 247Fm
| rowspan=3|7/2+#
|-
| SF (10%)
| (beberapa)
|-
| β+ (1%)
| 251Md
|-
| style="text-indent:1em" | 251mNo
| colspan="3" style="text-indent:2em" | 110(180)#&nbsp;keV
| 1,7(10)&nbsp;dtk
|
|
| 9/2−#
|-
| rowspan=3|252No
| rowspan=3 style="text-align:right" | 102
| rowspan=3 style="text-align:right" | 150
| rowspan=3|252,088967(10)
| rowspan=3|2,27(14)&nbsp;dtk
| α (73,09%)
| 248Fm
| rowspan=3|0+
|-
| SF (26,9%)
| (beberapa)
|-
| β+ (1%)
| 252Md
|-
| rowspan=3|253No
| rowspan=3 style="text-align:right" | 102
| rowspan=3 style="text-align:right" | 151
| rowspan=3|253,090564(7)
| rowspan=3|1,62(15)&nbsp;mnt
| α (80%)
| 249Fm
| rowspan=3|(9/2−)#
|-
| β+ (20%)
| 253Md
|-
| SF (10−3%)
| (beberapa)
|-
| style="text-indent:1em" | 253mNo
| colspan="3" style="text-indent:2em" | 129(19)&nbsp;keV
| 31&nbsp;μdtk
|
|
| 5/2+#
|-
| rowspan=3|254No
| rowspan=3 style="text-align:right" | 102
| rowspan=3 style="text-align:right" | 152
| rowspan=3|254,090956(11)
| rowspan=3|51(10)&nbsp;dtk
| α (89,3%)
| 250Fm
| rowspan=3|0+
|-
| β+ (10%)
| 254Md
|-
| SF (0,31%)
| (beberapa)
|-
| rowspan=2 style="text-indent:1em" | 254mNo
| rowspan=2 colspan="3" style="text-indent:2em" | 500(100)#&nbsp;keV
| rowspan=2|0,28(4)&nbsp;dtk
| IT (80%)
| 254No
| rowspan=2|0+
|-
| α (20%)
| 250Fm
|-
| rowspan=2|255No
| rowspan=2 style="text-align:right" | 102
| rowspan=2 style="text-align:right" | 153
| rowspan=2|255,093191(16)
| rowspan=2|3,1(2)&nbsp;mnt
| α (61,4%)
| 251Fm
| rowspan=2|(1/2+)
|-
| β+ (38,6%)
| 255Md
|-
| rowspan=3|256No
| rowspan=3 style="text-align:right" | 102
| rowspan=3 style="text-align:right" | 154
| rowspan=3|256,094283(8)
| rowspan=3|2,91(5)&nbsp;dtk
| α (99,44%)
| 252Fm
| rowspan=3|0+
|-
| SF (0,55%)
| (beberapa)
|-
| EC (0,01%)
| 256Md
|-
| rowspan=2|257No
| rowspan=2 style="text-align:right" | 102
| rowspan=2 style="text-align:right" | 155
| rowspan=2|257,096888(7)
| rowspan=2|25(2)&nbsp;dtk
| α (99%)
| 253Fm
| rowspan=2|(7/2+)
|-
| β+ (1%)
| 257Md
|-
| rowspan=3|258No
| rowspan=3 style="text-align:right" | 102
| rowspan=3 style="text-align:right" | 156
| rowspan=3|258,09821(11)#
| rowspan=3|1,2(2)&nbsp;mdtk
| SF (99,99%)
| (beberapa)
| rowspan=3|0+
|-
| α (0,01%)
| 254Fm
|-
| β+β+ (langka)
| 258Fm
|-
| rowspan=3|259No
| rowspan=3 style="text-align:right" | 102
| rowspan=3 style="text-align:right" | 157
| rowspan=3|259,10103(11)#
| rowspan=3|58(5)&nbsp;mnt
| α (75%)
| 255Fm
| rowspan=3|(9/2+)#
|-
| EC (25%)
| 259Md
|-
| SF (260No
| style="text-align:right" | 102
| style="text-align:right" | 158
| 260,10264(22)#
| 106(8)&nbsp;mdtk
| SF
| (beberapa)
| 0+

|-
| 262No
| style="text-align:right" | 102
| style="text-align:right" | 160
| 262,10746(39)#
| ~5&nbsp;mdtk
| SF
| (beberapa)
| 0+

## Referensi

* Massa isotop dari:
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* Komposisi isotop dan massa atom standar dari:
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* Data waktu paruh, spin, dan isomer dipilih dari sumber-sumber berikut.
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