I - Iodine

The solid halogen was discovered in 1811 by Bernard Courtois in seaweed. The solubility, reactions and phase changes of iodine are explored by our students. Iodine has been used for its antibacterial qualities. Leonard Cohen wrote a song named Iodine that describes the effect of iodine on the senses.

Atomic number - 53 Density g/mL 4 .92
Atomic weight u 126 .9045 Melting point K 386 .7
Bonding radius A 1 .33 Boiling point K 458 .4
Atomic radius A 1 .32 Heat of vaporization kJ/mol 20 .752
Ionization Potential V 10 .451 Heat of fusion kJ/mol 7 .824
Electronegativity - 2 .66 Specific heat J/gK 0 .214
The oxide is a strong acid.
Crystal are orthorhombic.

Electron config. : [Kr] 4d10 5s2 5p5

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113
Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Isotopes of I: Click mass number for decay process, product for element page.
108
36 msec
a,4.030 MeV
Sb-104
107.94353 		109
100 usec
p,3.230 MeV
Te-108
108.93819 		110
0.65 sec
a/EC/ECa/ECp,11.900
Sb-106/Te-110/Sn-106/Sb-109
109.93526 		111
2.5 sec
a/EC,8.500
Sb-107/Te-111
110.93032 		112
3.42 sec
a/EC,10.200
Sb-108/Te-112
111.92796 		113
6.6 sec
a/EC,7.200
Sb-109/Te-113
112.92364 		114
2.1 sec
EC/ECp,9.100
Te-114/Sb-113
113.92184
115
1.3 min
EC,5.900 MeV
Te-115
114.91787 		116
2.91 sec
EC,7.750 MeV
Te-116
115.91673 		117
2.22 min
EC,4.670 MeV
Te-117
116.91364 		118
13.7 min
EC,7.040 MeV
Te-118
117.91339 		119
19.1 min
EC,3.510 MeV
Te-119
118.91017 		120
81.0 min
EC,5.615 MeV
Te-120
119.91005 		121
2.12 hr
EC,2.270 MeV
Te-121
120.90737
122
3.63 min
EC,4.234 MeV
Te-122
121.90760 		123
13.27 hr
EC,1.242 MeV
Te-123
122.90560 		124
4.1760 da
EC,3.160 MeV
Te-124
123.90621 		125
59.408 da
EC,2.392 MeV
Te-125
124.90462 		126
13.11 da
B-/EC,2.155
Xe-126/Te-126
125.90561 		127 100%

Stable

126.90446 		128
24.99 min
B-/EC,2.118
Xe-128/Te-128
127.90580
129
1.57E+7 yr
B-,1.604 MeV
Xe-129
128.90498 		130
12.36 hr
B-,2.949 MeV
Xe-130
129.90667 		131
8.02070 da
B-,2.415 MeV
Xe-131
130.90612 		132
2.295 hr
B-,3.577 MeV
Xe-132
131.90799 		133
20.8 hr
B-,1.770 MeV
Xe-133
132.90780 		134
52.5 min
B-,4.170 MeV
Xe-134
133.90987 		135
6.57 hr
B-,2.648 MeV
Xe-135
134.91005
136
83.4 sec
B-,6.930 MeV
Xe-136
135.91465 		137
24.5 sec
B-/B-n,5.880
Xe-137/Xe-136
136.91787 		138
6.49 sec
B-/B-n,7.820
Xe-138/Xe-137
137.92238 		139
2.280 sec
B-/B-n,6.806
Xe-139/Xe-138
138.92609 		140
0.86 sec
B-/B-n,8.760
Xe-140/Xe-139
139.93103 		141
0.43 sec
B-/B-n,7.800
Xe-141/Xe-140
140.93505 		142
0.2 sec
B-,6.150 MeV
Xe-142
142.0
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.