Изотопи на менделевиумот

Менделевиумот (101Md) е синтетички елемент и затоа не може да се даде негова стандардна атомска тежина. Како и сите вештачки елементи, и тој нема стабилни изотопи. Првиот изотоп што бил синтетизиран бил 256Md (кој исто така бил првиот изотоп на кој било елемент произведен атом по атом) во 1955 година. Познати се 17 радиоизотопи, со атомска маса од 244Md до 260Md и 5 изомери. Најдолговечниот изотоп е 258Md со време на полураспад од 51,3 дена, а најдолготрајниот изомер е 258mMd со време на полураспад од 57 минути.

## Список на изотопи

|-
| rowspan=2|244Md}}
| rowspan=2 style="text-align:right" | 101
| rowspan=2 style="text-align:right" | 143
| rowspan=2|244,08116(40)#
| rowspan=2|0,36(14)&nbsp;с
| α
| 240Es
| rowspan=2|3+#
|-
| β<sup>+</sup>, SF (244mMd
| colspan="3" style="text-indent:2em" | 200(150)#&nbsp;keV
| ~9&nbsp;μс
| IT
| 244Md
| 7+#
|-id=Менделевиум-245
| 245Md
| style="text-align:right" | 101
| style="text-align:right" | 144
| 245,08086(28)#
| 0,38(10)&nbsp;с
| α
| 241Es
| (7/2−)
|-id=Менделевиум-245m
| style="text-indent:1em" | 245mMd
| colspan="3" style="text-indent:2em" | 100(100)#&nbsp;keV
| 0,90(25)&nbsp;мс
| SF
| (various)
| 1/2−#
|-id=Менделевиум-246
| 246Md
| style="text-align:right" | 101
| style="text-align:right" | 145
| 246,08171(28)#
| 0,92(18)&nbsp;с
| α
| 242Es
| 1−#
|-id=Менделевиум-246m
| rowspan=3 style="text-indent:1em" | 246mMd
| rowspan=3 colspan="3" style="text-indent:2em" | 60(60)&nbsp;keV
| rowspan=3|4,4(8)&nbsp;с
| β+ (~67%)
| 246Fm
| rowspan=3|4−#
|-
| α (242Es
|-
| β+, SF (>10%)
| (various)
|-
| rowspan=2|247Md
| rowspan=2 style="text-align:right" | 101
| rowspan=2 style="text-align:right" | 146
| rowspan=2|247,08152(22)#
| rowspan=2|1,20(12)&nbsp;с
| α (99,14%)
| 243Es
| rowspan=2|(7/2−)
|-
| SF (0,86%)
| (various)
|-id=Менделевиум-247m
| rowspan=2 style="text-indent:1em" | 247mMd
| rowspan=2 colspan="3" style="text-indent:2em" | 153&nbsp;keV
| rowspan=2|0,23(3)&nbsp;с
| α (80%)
| 243Es
| rowspan=2|(1/2−)
|-
| SF (20%)
| (various)
|-
| rowspan=3|248Md
| rowspan=3 style="text-align:right" | 101
| rowspan=3 style="text-align:right" | 147
| rowspan=3|248,08261(20)#
| rowspan=3|7(3)&nbsp;с
| β+ (80%)
| 248Fm
| rowspan=3|
|-
| α (20%)
| 244Es
|-
| β+, SF (249Md
| rowspan=2 style="text-align:right" | 101
| rowspan=2 style="text-align:right" | 148
| rowspan=2|249,08286(18)
| rowspan=2|25,6(9)&nbsp;с
| α (75%)
| 245Es
| rowspan=2|(7/2−)
|-
| β+ (25%)
| 249Fm
|-id=Менделевиум-249m
| style="text-indent:1em" | 249mMd
| colspan="3" style="text-indent:2em" | 100(100)#&nbsp;keV
| 1,9(9)&nbsp;с
| α
| 245Es
| (1/2−)
|-
| rowspan=3|250Md
| rowspan=3 style="text-align:right" | 101
| rowspan=3 style="text-align:right" | 149
| rowspan=3|250,084165(98)
| rowspan=3|54(4)&nbsp;с
| β+ (93,0%)
| 250Fm
| rowspan=3|2−#
|-
| α (7,0%)
| 246Es
|-
| β+, SF (0,026%)
| (various)
|-id=Менделевиум-250m
| style="text-indent:1em" | 250mMd
| colspan="3" style="text-indent:2em" | 120(40)&nbsp;keV
| 42,4(45)&nbsp;с
| α
| 246Es
| 7+#
|-
| rowspan=2|251Md
| rowspan=2 style="text-align:right" | 101
| rowspan=2 style="text-align:right" | 150
| rowspan=2|251,084774(20)
| rowspan=2|4,21(23)&nbsp;мин
| β+ (90%)
| 251Fm
| rowspan=2|(7/2−)
|-
| α (10%)
| 247Es
|-id=Менделевиум-251m
| style="text-indent:1em" | 251mMd
| colspan="3" style="text-indent:2em" | 53(8)&nbsp;keV
| 20#&nbsp;с
| 
| 
| (1/2−)
|-id=Менделевиум-252
| 252Md
| style="text-align:right" | 101
| style="text-align:right" | 151
| 252,086385(98)
| 2,3(8)&nbsp;мин
| β+
| 252Fm
| 1+#
|-
| rowspan=2|253Md
| rowspan=2 style="text-align:right" | 101
| rowspan=2 style="text-align:right" | 152
| rowspan=2|253,087143(34)#
| rowspan=2|12(8)&nbsp;мин
| β+ (~99,3%)
| 253Fm
| rowspan=2|(7/2−)
|-
| α (~0,7%)
| 249Es
|-id=Менделевиум-253m
| style="text-indent:1em" | 253mMd
| colspan="3" style="text-indent:2em" | 60(30)&nbsp;keV
| 1#&nbsp;мин
| 
| 
| (1/2−)
|-id=Менделевиум-254
| 254Md
| style="text-align:right" | 101
| style="text-align:right" | 153
| 254,08959(11)#
| 10(3)&nbsp;мин
| β+
| 254Fm
| 0−#
|-id=Менделевиум-254m
| style="text-indent:1em" | 254mMd
| colspan="3" style="text-indent:2em" | 50(100)#&nbsp;keV
| 28(8)&nbsp;мин
| β+
| 254Fm
| 3−#
|-
| rowspan=2|255Md
| rowspan=2 style="text-align:right" | 101
| rowspan=2 style="text-align:right" | 154
| rowspan=2|255,0910817(60)
| rowspan=2|27(2)&nbsp;мин
| β+ (93%)
| 255Fm
| rowspan=2|7/2−
|-
| α (7%)
| 251Es
|-
| rowspan=3|256Md
| rowspan=3 style="text-align:right" | 101
| rowspan=3 style="text-align:right" | 155
| rowspan=3|256,09389(13)#
| rowspan=3|77,7(18)&nbsp;мин
| β+ (90,8%)
| 256Fm
| rowspan=3|(1−)
|-
| α (9,2%)
| 252Es
|-
| SF (257Md
| rowspan=2 style="text-align:right" | 101
| rowspan=2 style="text-align:right" | 156
| rowspan=2|257,0955373(17)
| rowspan=2|5,52(5)&nbsp;ч
| EC (85%)
| 257Fm
| rowspan=2|(7/2−)
|-
| α (15%)
| 253Es
|-
| rowspan=3|258Md
| rowspan=3 style="text-align:right" | 101
| rowspan=3 style="text-align:right" | 157
| rowspan=3|258,0984336(37)
| rowspan=3|51,59(29)&nbsp;д
| α
| 254Es
| rowspan=3|(8−)#
|-
| β− (258No
|-
| β+ (258Fm
|-id=Менделевиум-258m
| rowspan=3 style="text-indent:1em" | 258mMd
| rowspan=3 colspan="3" style="text-indent:2em" | 0(200)#&nbsp;keV
| rowspan=3|57,0(9)&nbsp;мин
| EC (85%)
| 258Fm
| rowspan=3|1−#
|-
| SF (254Es
|-id=Менделевиум-259
| 259Md
| style="text-align:right" | 101
| style="text-align:right" | 158
| 259,10045(11)#
| 1,60(6)&nbsp;ч
| SF
| (various)
| 7/2−#
|-
| rowspan=4|260Md
| rowspan=4 style="text-align:right" | 101
| rowspan=4 style="text-align:right" | 159
| rowspan=4|260,10365(34)#
| rowspan=4|27,8(8)&nbsp;д
| SF
| (various)
| rowspan=4|
|-
| α (256Es
|-
| EC (260Fm
|-
| β− (260No



## Наводи

* Isotope masses from:
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* Half-life, spin, and isomer data selected from the following sources.
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Менделевиум
Категорија:Менделевиум
Категорија:Изотопи на менделевиумот