鍆有 244Md 至 260Md 共 17 種同位素，全部都有放射性，其中 258Md 最穩定，半衰期 5159 天。 圖表 244Md styletextalignright 101 styletextalignright 143 036 14 ms 240Es 3 styletextindent1em 244mMd colspan3 styletextindent2em 200 150 keV 9 μs 244Md 7 rowspan2245Md rowspan2 styletextalignright 101 rowspan2 styletextalignright 144 rowspan224508081 33 rowspan2090 25 ms SF various rowspan212 （不常見） 241Es rowspan2 styletextindent1em 245mMd rowspan2 colspan3 styletextindent2em 200 100 keV rowspan2400 200 ms 035 2316 s 241Es rowspan272 （不常見） 245Fm rowspan2246Md rowspan2 styletextalignright 101 rowspan2 styletextalignright 145 rowspan224608171 28 rowspan210 4 s 242Es rowspan2 （不常見） 246Fm rowspan2247Md rowspan2 styletextalignright 101 rowspan2 styletextalignright 146 rowspan224708152 22 rowspan2112 22 s SF various rowspan212 （不常見） 243Es rowspan2 styletextindent1em 247mMd rowspan2 colspan3 styletextindent2em rowspan202 s 9999 243Es rowspan2 SF 104 various rowspan3248Md rowspan3 styletextalignright 101 rowspan3 styletextalignright 147 rowspan324808282 26 rowspan37 3 s 80 248Fm rowspan3 20 244Es SF 05 various rowspan2249Md rowspan2 styletextalignright 101 rowspan2 styletextalignright 148 rowspan224908291 22 rowspan224 4 s 60 245Es rowspan272 40 249Fm styletextindent1em 249mMd colspan3 styletextindent2em 100 100 keV 19 9 s 12 rowspan3250Md rowspan3 styletextalignright 101 rowspan3 styletextalignright 149 rowspan325008442 32 rowspan352 6 s 93 250Fm rowspan3 7 246Es SF 02 various rowspan2251Md rowspan2 styletextalignright 101 rowspan2 styletextalignright 150 rowspan2251084774 20 rowspan240 5 min 90 251Fm rowspan272 10 247Es rowspan2252Md rowspan2 styletextalignright 101 rowspan2 styletextalignright 151 rowspan225208643 14 rowspan223 8 min 50 252Fm rowspan2 50 248Es rowspan2253Md rowspan2 styletextalignright 101 rowspan2 styletextalignright 152 rowspan225308714 3 rowspan212 8 min 6 123 min 253Fm rowspan272 249Es rowspan2254Md rowspan2 styletextalignright 101 rowspan2 styletextalignright 153 rowspan225408959 11 rowspan210 3 min 254Fm rowspan20 （不常見） 250Es rowspan2 styletextindent1em 254mMd rowspan2 colspan3 styletextindent2em 50 100 keV rowspan228 8 min 254Fm rowspan23 （不常見） 250Es rowspan3255Md rowspan3 styletextalignright 101 rowspan3 styletextalignright 154 rowspan3255091084 7 rowspan327 2 min 92 255Fm rowspan372 8 251Es SF 15 various rowspan2256Md rowspan2 styletextalignright 101 rowspan2 styletextalignright 155 rowspan225609389 13 rowspan277 2 min 89 256Fm rowspan21 11 252Es rowspan3257Md rowspan3 styletextalignright 101 rowspan3 styletextalignright 156 rowspan32570955424 29 rowspan3552 5 h 848 257Fm rowspan372 152 253Es SF 1 various rowspan3258Md rowspan3 styletextalignright 101 rowspan3 styletextalignright 157 rowspan3258098431 5 rowspan3515 3 d 9999 254Es rowspan38 0015 258No 0015 258Fm rowspan4 styletextindent1em 258mMd rowspan4 colspan3 styletextindent2em 0 200 keV rowspan4570 9 min 70 258Fm rowspan41 SF 20 various 10 258No 12 254Es rowspan2259MdNot directly synthesized occurs as decay product of 259No rowspan2 styletextalignright 101 rowspan2 styletextalignright 158 rowspan225910051 22 rowspan2160 6 h SF 987 various rowspan272 13 255Es rowspan4260Md rowspan4 styletextalignright 101 rowspan4 styletextalignright 159 rowspan426010365 34 rowspan4278 8 d SF 85 various rowspan4 5 256Es 5 260Fm 35 260No 參考文獻 Isotope masses from Ame2003 Atomic Mass Evaluation by G Audi AH Wapstra C Thibault J Blachot and O Bersillon in Nuclear Physics A729 2003 Halflife spin and isomer data selected from these sources Editing notes on this articles talk page Audi Bersillon Blachot Wapstra The Nubase2003 evaluation of nuclear and decay properties Nuc Phys A 729 pp 3128 2003 National Nuclear Data Center Brookhaven National Laboratory Information extracted from the NuDat 21 database retrieved Sept 2005 David R Lide ed Norman E Holden in CRC Handbook of Chemistry and Physics 85th Edition online version CRC Press Boca Raton Florida 2005 Section 11 Table of the Isotopes Md