| 41. | At least 32 nuclear isomers have also been characterized, ranging in atomic mass from 170 to 200.
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| 42. | Standard atomic weight is related to atomic mass by the abundance ranking of isotopes for each element.
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| 43. | Spontaneous fission is feasible over practical observation times only for atomic masses of 232 amu or more.
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| 44. | The atomic masses of naturally occurring isotopes of an element determine the atomic mass of the element.
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| 45. | The exact ratio you get for a singly charged species is the exact atomic mass for that atom.
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| 46. | In fact, gravimetric analysis was used to determine the atomic masses of many elements to six figure accuracy.
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| 47. | A total of 38 isotopes of iodine have been discovered, with atomic masses ranging from 108 to 145.
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| 48. | Bismuth has classically been considered to be the heaviest naturally occurring stable element, in terms of atomic mass.
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| 49. | This rule predicts the atomic mass of nuclides and isotopes with an error of at most 1 %.
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| 50. | Its atomic mass is 91.224.
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