鉻（原子質量單位：509415 1）共有 28 個同位素，其中有 4 個是穩定的。 圖表 rowspan242Cr rowspan2 styletextalignright 24 rowspan2 styletextalignright 18 rowspan24200643 32 rowspan214 3 ms 13 42 ms 999 42V rowspan20 rowspan2 rowspan2 2 1 40Ti rowspan443Cr rowspan4 styletextalignright 24 rowspan4 styletextalignright 19 rowspan44299771 24 rowspan4216 7 ms 71 43V rowspan432 rowspan4 rowspan4 23 42Ti 2 6 41Sc 1 39Sc rowspan244Cr rowspan2 styletextalignright 24 rowspan2 styletextalignright 20 rowspan24398555 5 rowspan254 4 ms 53 43 ms 93 44V rowspan20 rowspan2 rowspan2 7 43Ti rowspan245Cr rowspan2 styletextalignright 24 rowspan2 styletextalignright 21 rowspan24497964 54 rowspan250 6 ms 73 45V rowspan272 rowspan2 rowspan2 27 44Ti rowspan2 styletextindent1em 45mCr rowspan2 colspan3 styletextindent2em 50 100 keV rowspan21 ms IT 45Cr rowspan232 rowspan2 rowspan2 β 45V 46Cr styletextalignright 24 styletextalignright 22 45968359 21 026 6 s β 46V 0 47Cr styletextalignright 24 styletextalignright 23 46962900 15 500 15 ms β 47V 32 48Cr styletextalignright 24 styletextalignright 24 47954032 8 2156 3 h β 48V 0 49Cr styletextalignright 24 styletextalignright 25 489513357 26 423 1 min β 49V 52 50Cr styletextalignright 24 styletextalignright 26 499460442 11 colspan3 aligncenter 觀測上穩定理論上可以雙電子捕獲成 50Tisup，半衰期超過 13 年 0 004345 13 004294004345 51Cr styletextalignright 24 styletextalignright 27 509447674 11 277025 24 d 51V 72 styletextalignright 24 styletextalignright 28 519405075 8 colspan3 aligncenter 0 083789 18 083762083790 53Cr styletextalignright 24 styletextalignright 29 529406494 8 colspan3 aligncenter 穩定 32 009501 17 009501009553 54Cr styletextalignright 24 styletextalignright 30 539388804 8 colspan3 aligncenter 穩定 0 002365 7 002365002391 55Cr styletextalignright 24 styletextalignright 31 549408397 8 3497 3 min β 55Mn 32 56Cr styletextalignright 24 styletextalignright 32 559406531 20 594 10 min β 56Mn 0 57Cr styletextalignright 24 styletextalignright 33 56943613 2 211 10 s β 57Mn 32 58Cr styletextalignright 24 styletextalignright 34 5794435 22 70 3 s β 58Mn 0 59Cr styletextalignright 24 styletextalignright 35 5894859 26 460 50 ms β 59Mn 52 styletextindent1em 59mCr colspan3 styletextindent2em 5030 17 keV 96 20 µs 92 60Cr styletextalignright 24 styletextalignright 36 5995008 23 560 60 ms β 60Mn 0 rowspan261Cr rowspan2 styletextalignright 24 rowspan2 styletextalignright 37 rowspan26095472 27 rowspan2261 15 ms β 999 61Mn rowspan252 rowspan2 rowspan2 β 1 60Mn rowspan262Cr rowspan2 styletextalignright 24 rowspan2 styletextalignright 38 rowspan26195661 36 rowspan2199 9 ms β 999 62Mn rowspan20 rowspan2 rowspan2 β n 61Mn rowspan263Cr rowspan2 styletextalignright 24 rowspan2 styletextalignright 39 rowspan26296186 32 rowspan2129 2 ms β 63Mn rowspan212 rowspan2 rowspan2 β n 62Mn 64Cr styletextalignright 24 styletextalignright 40 6396441 43 43 1 ms β 64Mn 0 65Cr styletextalignright 24 styletextalignright 41 6497016 54 27 3 ms β 65Mn 12 66Cr styletextalignright 24 styletextalignright 42 6597338 64 10 6 ms β 66Mn 0 67Cr styletextalignright 24 styletextalignright 43 6697955 75 10 ms 300 ns β 67Mn 12 rowspan368Cr rowspan3 styletextalignright 24 rowspan3 styletextalignright 44 rowspan36798316 54 rowspan310 ms 620 ns β 理論上可以發生，但仍未被觀測到 68Mn rowspan30 rowspan3 rowspan3 β n 67Mn β 2n 66Mn rowspan369Cr rowspan3 styletextalignright 24 rowspan3 styletextalignright 45 rowspan36898966 54 rowspan36 ms 620 ns β 69Mn rowspan372 rowspan3 rowspan3 β n 68Mn β 2n 67Mn rowspan370Cr rowspan3 styletextalignright 24 rowspan3 styletextalignright 46 rowspan36999395 64 rowspan36 ms 620 ns β 70Mn rowspan30 rowspan3 rowspan3 β n 69Mn β 2n 68Mn 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 Isotopic compositions and standard atomic masses from Atomic weights of the elements Review 2000 IUPAC Technical Report Pure Appl Chem Vol 75 No 6 pp 683800 2003 and Atomic Weights Revised 2005 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 Cr Category 鉻