As
Арсен
Z 33 74,922 г/мольМеталоїд
| 75As | 42 | 74,9216 | -73 034,2 | 100,0% | Стабільний | 3/2- | --- | 1920 |
| 60As | 27 | 59,9939 | -5 640,0 | --- | --- | (5+) | p→59Ge | --- |
| 60mAs | 27 | 59,994 | -5 580,0 | --- | --- | (2+) | p→59Ge | --- |
| 61As | 28 | 60,9815 | -17 200,0 | --- | --- | (3/2-) | p→60Ge | --- |
| 62As | 29 | 61,9738 | -24 420,0 | --- | --- | (1+) | p→61Ge | --- |
| 63As | 30 | 62,964 | -33 500,0 | --- | --- | (3/2-) | p→62Ge | --- |
| 64As | 31 | 63,9576 | -39 530,0 | --- | 69,0 мс | (0+) | β⁺→64Ge(100%) β⁺p→63Ga | 1995 |
| 65As | 32 | 64,9496 | -46 940,0 | --- | 130,3 мс | (3/2-) | β⁺→65Ge(100%) β⁺p→64Ga | 1991 |
| 66As | 33 | 65,9441 | -52 025,0 | --- | 95,77 мс | 0+ | β⁺→66Ge(100%) | 1978 |
| 66mAs | 33 | 65,9456 | -50 668,0 | --- | 1,14 мкс | 5+ | γ→66As(100%) | 1995 |
| 66nAs | 33 | 65,9474 | -49 001,0 | --- | 7,98 мкс | 9+ | γ→66As(100%) | 1998 |
| 67As | 34 | 66,9393 | -56 587,2 | --- | 42,5 с | (5/2-) | β⁺→67Ge(100%) | 1980 |
| 68As | 35 | 67,9368 | -58 894,5 | --- | 2,53 хв | 3+ | β⁺→68Ge(100%) | 1971 |
| 68mAs | 35 | 67,9372 | -58 469,4 | --- | 111,0 нс | 1+ | γ→68As(100%) | 1994 |
| 69As | 36 | 68,9322 | -63 110,0 | --- | 15,2 хв | 5/2- | β⁺→69Ge(100%) | 1955 |
| 70As | 37 | 69,9309 | -64 334,0 | --- | 52,6 хв | 4+ | β⁺→70Ge(100%) | 1950 |
| 70mAs | 37 | 69,931 | -64 302,0 | --- | 96,0 мкс | 2+ | γ→70As(100%) | 1979 |
| 71As | 38 | 70,9271 | -67 893,0 | --- | 2,72 д | 5/2- | β⁺→71Ge(100%) | 1939 |
| 72As | 39 | 71,9268 | -68 230,0 | --- | 1,08 д | 2- | β⁺→72Ge(100%) | 1939 |
| 73As | 40 | 72,9238 | -70 953,0 | --- | 80,3 д | 3/2- | EC→73Ge(100%) | 1948 |
| 73mAs | 40 | 72,9243 | -70 525,0 | --- | 5,7 мкс | 9/2+ | γ→73As(100%) | 1956 |
| 74As | 41 | 73,9239 | -70 860,1 | --- | 17,77 д | 2- | β⁺→74Ge(66%) β⁻→74Se(34%) | 1938 |
| 75mAs | 42 | 74,9219 | -72 730,3 | --- | 17,62 мс | 9/2+ | γ→75As(100%) | 1957 |
| 76As | 43 | 75,9224 | -72 291,4 | --- | 1,09 д | 2- | β⁻→76Se(100%) | 1934 |
| 76mAs | 43 | 75,9224 | -72 247,0 | --- | 1,84 мкс | (1+) | γ→76As(100%) | 1966 |
| 77As | 44 | 76,9206 | -73 916,3 | --- | 1,62 д | 3/2- | β⁻→77Se(100%) | 1951 |
| 77mAs | 44 | 76,9212 | -73 440,8 | --- | 114,0 мкс | 9/2+ | γ→77As(100%) | 1957 |
| 78As | 45 | 77,9218 | -72 817,0 | --- | 1,51 год | 2- | β⁻→78Se(100%) | 1937 |
| 79As | 46 | 78,9209 | -73 636,0 | --- | 9,01 хв | 3/2- | β⁻→79Se(100%) | 1950 |
| 79mAs | 46 | 78,9218 | -72 863,0 | --- | 1,21 мкс | (9/2+) | γ→79As(100%) | 1998 |
| 80As | 47 | 79,9225 | -72 215,0 | --- | 15,2 с | 1+ | β⁻→80Se(100%) | 1954 |
| 81As | 48 | 80,9221 | -72 533,3 | --- | 33,3 с | 3/2- | β⁻→81Se(100%) | 1960 |
| 82As | 49 | 81,9247 | -70 105,0 | --- | 19,1 с | (2-) | β⁻→82Se(100%) | 1968 |
| 82mAs | 49 | 81,9249 | -69 973,0 | --- | 13,6 с | (5-) | β⁻→82Se(100%) | 1970 |
| 83As | 50 | 82,9252 | -69 669,3 | --- | 13,4 с | (5/2-) | β⁻→83Se(100%) | 1968 |
| 84As | 51 | 83,9293 | -65 854,0 | --- | 3,16 с | (2-) | β⁻→84Se(99,72%) β⁻n→83Se(0,28%) | 1968 |
| 84mAs | 51 | 84,0 | 0,0 | --- | 650,0 мс | --- | β⁻→84Se(100%) | 1974 |
| 85As | 52 | 84,9322 | -63 189,0 | --- | 2,02 с | (5/2-) | β⁻n→84Se(62,6%) β⁻→85Se(37,4%) | 1967 |
| 86As | 53 | 85,9367 | -58 962,0 | --- | 945,0 мс | (1-) | β⁻→86Se(64,5%) β⁻n→85Se(35,5%) β⁻n→84Se | 1973 |
| 87As | 54 | 86,9403 | -55 617,9 | --- | 492,0 мс | (5/2-) | β⁻→87Se(84,6%) β⁻n→86Se(15,4%) β⁻n→85Se | 1970 |
| 88As | 55 | 87,9458 | -50 450,0 | --- | 270,0 мс | --- | β⁻→88Se(100%) β⁻n→87Se | 1994 |
| 89As | 56 | 88,95 | -46 530,0 | --- | 220,0 мс | (5/2-) | β⁻→89Se β⁻n→88Se β⁻n→87Se | 1994 |
| 90As | 57 | 89,956 | -40 990,0 | --- | 70,0 мс | --- | β⁻→90Se β⁻n→89Se β⁻n→88Se | 1997 |
| 90mAs | 57 | 89,9561 | -40 870,0 | --- | 220,0 нс | --- | γ→90As(100%) | 2012 |
| 91As | 58 | 90,9608 | -36 500,0 | --- | 100,0 мс | (5/2-) | β⁻→91Se β⁻n→90Se β⁻n→89Se | 1997 |
| 92As | 59 | 91,9674 | -30 380,0 | --- | 45,0 мс | --- | β⁻→92Se β⁻n→91Se β⁻n→90Se | 1997 |