Fe
ФерумЗалізо
ЗалізоФерумZ 26 55,845 г/мольПерехідний метал
| 56Fe | 30 | 55,9349 | -60 607,16 | 91,754% | Стабільний | 0+ | --- | 1923 |
| 54Fe | 28 | 53,9396 | -56 254,6 | 5,845% | Спостережний | 0+ | β⁺ | 1923 |
| 57Fe | 31 | 56,9354 | -60 182,02 | 2,119% | Стабільний | 1/2- | --- | 1935 |
| 58Fe | 32 | 57,9333 | -62 155,3 | 0,282% | Стабільний | 0+ | --- | 1935 |
| 45Fe | 19 | 45,0155 | 14 410,0 | --- | 2,5 мс | (3/2+) | p→43Cr(70%) β⁺p→44Cr(18,9%) β⁺p→43V(7,8%) β⁺→45Mn(3,3%) | 1996 |
| 46Fe | 20 | 46,0013 | 1 210,0 | --- | 13,0 мс | 0+ | β⁺p→45Cr(78,7%) β⁺→46Mn(21,3%) β⁺p→44V | 1992 |
| 47Fe | 21 | 46,9923 | -7 130,0 | --- | 21,9 мс | (7/2-) | β⁺p→46Cr(88,4%) β⁺→47Mn(11,6%) | 1992 |
| 47mFe | 21 | 46,9932 | -6 360,0 | --- | --- | (3/2+) | γ→47Fe | --- |
| 48Fe | 22 | 47,9807 | -18 010,0 | --- | 45,3 мс | 0+ | β⁺→48Mn(84,7%) β⁺p→47Cr(15,3%) | 1987 |
| 49Fe | 23 | 48,9734 | -24 751,0 | --- | 64,7 мс | (7/2-) | β⁺p→48Cr(56,7%) β⁺→49Mn(43,3%) | 1970 |
| 50Fe | 24 | 49,963 | -34 476,0 | --- | 152,0 мс | 0+ | β⁺→50Mn(100%) | 1977 |
| 51Fe | 25 | 50,9569 | -40 189,2 | --- | 305,4 мс | 5/2- | β⁺→51Mn(100%) | 1972 |
| 52Fe | 26 | 51,9481 | -48 332,1 | --- | 8,28 год | 0+ | β⁺→52Mn(100%) | 1948 |
| 52mFe | 26 | 51,9556 | -41 371,43 | --- | 45,9 с | 12+ | β⁺→52Mn(99,979%) γ→52Fe(0,021%) | 1979 |
| 53Fe | 27 | 52,9453 | -50 947,5 | --- | 8,51 хв | 7/2- | β⁺→53Mn(100%) | 1938 |
| 53mFe | 27 | 52,9486 | -47 907,1 | --- | 2,54 хв | 19/2- | γ→53Fe(100%) | 1967 |
| 54mFe | 28 | 53,9466 | -49 727,5 | --- | 364,0 нс | 10+ | γ→54Fe(100%) | 1983 |
| 55Fe | 29 | 54,9383 | -57 481,4 | --- | 2,76 р | 3/2- | EC→55Mn(100%) | 1939 |
| 59Fe | 33 | 58,9349 | -60 665,0 | --- | 44,5 д | 3/2- | β⁻→59Co(100%) | 1938 |
| 60Fe | 34 | 59,9341 | -61 413,0 | --- | 2,62 Мр | 0+ | β⁻→60Co(100%) | 1957 |
| 61Fe | 35 | 60,9367 | -58 920,5 | --- | 5,98 хв | (3/2-) | β⁻→61Co(100%) | 1957 |
| 61mFe | 35 | 60,9377 | -58 058,8 | --- | 238,0 нс | 9/2+ | γ→61Fe(100%) | 1998 |
| 62Fe | 36 | 61,9368 | -58 878,1 | --- | 1,13 хв | 0+ | β⁻→62Co(100%) | 1975 |
| 63Fe | 37 | 62,9403 | -55 636,0 | --- | 6,1 с | (5/2-) | β⁻→63Co(100%) | 1980 |
| 64Fe | 38 | 63,941 | -54 970,0 | --- | 2,0 с | 0+ | β⁻→64Co(100%) | 1980 |
| 65Fe | 39 | 64,945 | -51 218,0 | --- | 805,0 мс | (1/2-) | β⁻→65Co(100%) β⁻n→64Co | 1980 |
| 65mFe | 39 | 64,9454 | -50 824,0 | --- | 1,12 с | (9/2+) | β⁻→65Co | 2008 |
| 65nFe | 39 | 64,9454 | -50 820,0 | --- | 418,0 нс | (5/2+) | γ→65Fe(100%) | 1998 |
| 66Fe | 40 | 65,9462 | -50 068,0 | --- | 467,0 мс | 0+ | β⁻→66Co(100%) β⁻n→65Co | 1985 |
| 67Fe | 41 | 66,9509 | -45 708,0 | --- | 394,0 мс | (1/2-) | β⁻→67Co(100%) β⁻n→66Co | 1985 |
| 67mFe | 41 | 66,9514 | -45 305,0 | --- | 64,0 мкс | (5/2+) | γ→67Fe(100%) | 1998 |
| 67nFe | 41 | 66,9514 | -45 260,0 | --- | 75,0 мкс | (9/2+) | γ→67Fe(100%) | 2008 |
| 68Fe | 42 | 67,9529 | -43 900,0 | --- | 188,0 мс | 0+ | β⁻→68Co(100%) | 1985 |
| 69Fe | 43 | 68,9579 | -39 200,0 | --- | 162,0 мс | (1/2-) | β⁻→69Co(100%) β⁻n→68Co β⁻n→67Co | 1992 |
| 70Fe | 44 | 69,9604 | -36 890,0 | --- | 61,4 мс | 0+ | β⁻→70Co(100%) β⁻n→69Co | 1997 |
| 71Fe | 45 | 70,9657 | -31 930,0 | --- | 34,3 мс | (7/2+) | β⁻→71Co(100%) β⁻n→70Co β⁻n→69Co | 1997 |
| 72Fe | 46 | 71,9686 | -29 250,0 | --- | 17,0 мс | 0+ | β⁻→72Co(100%) β⁻n→71Co β⁻n→70Co | 1997 |
| 73Fe | 47 | 72,9742 | -23 990,0 | --- | 12,9 мс | (7/2+) | β⁻→73Co(100%) β⁻n→72Co β⁻n→71Co | 2010 |
| 74Fe | 48 | 73,9778 | -20 660,0 | --- | 5,0 мс | 0+ | β⁻→74Co(100%) β⁻n→73Co β⁻n→72Co | 2010 |
| 75Fe | 49 | 74,9842 | -14 700,0 | --- | 9,0 мс | (9/2+) | β⁻→75Co β⁻n→74Co β⁻n→73Co | 2013 |
| 76Fe | 50 | 75,9886 | -10 590,0 | --- | 3,0 мс | 0+ | β⁻→76Co | 2017 |