Isotopes of iodine

Iodine (I)
Standard atomic mass: 126.90447(3) u
Is considered a monoisotopic element.

Table

Z(p)	N(n)	isotopic mass (u)	nuclide symbol	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
53	55	107.94348(39)#	I-108
53	56	108.93815(11)	I-109
53	57	109.93524(33)#	I-110
53	58	110.93028(32)#	I-111
53	59	111.92797(23)#	I-112
53	60	112.92364(6)	I-113
53	61	113.92185(32)#	I-114
53	62	114.91805(3)	I-115
53	63	115.91681(10)	I-116
53	64	116.91365(3)	I-117
53	65	117.913074(21)	I-118
53	66	118.91007(3)	I-119
53	67	119.910048(19)	I-120
53	68	120.907367(11)	I-121
53	69	121.907589(6)	I-122
53	70	122.905589(4)	I-123
53	71	123.9062099(25)	I-124
53	72	124.9046302(16)	I-125
53	73	125.905624(4)	I-126
53	74	126.904473(4)	I-127	1.0000
53	75	127.905809(4)	I-128
53	76	128.904988(3)	I-129
53	77	129.906674(3)	I-130
53	78	130.9061246(12)	I-131
53	79	131.907997(6)	I-132
53	80	132.907797(5)	I-133
53	81	133.909744(9)	I-134
53	82	134.910048(8)	I-135
53	83	135.91465(5)	I-136
53	84	136.917871(30)	I-137
53	85	137.92235(9)	I-138
53	86	138.92610(3)	I-139
53	87	139.93100(21)#	I-140
53	88	140.93503(21)#	I-141
53	89	141.94018(43)#	I-142
53	90	142.94456(43)#	I-143
53	91	143.94999(54)#	I-144

Notes

• Values marked # are not purely derived from experimental data, but at least partly from systematic trends.
• Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values from Ame2003 denote one standard deviation. Values from IUPAC are expanded uncertainties.

References

• Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. 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. 683-800, (2003).

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