Te - Tellurium

A metallic appearing metaloid, tellurium was discovered in 1782 by Baron von Reichenstein in Romania.

Atomic number - 52 Density g/mL 6 .24
Atomic weight u 127 .6 Melting point K 722 .65
Bonding radius A 1 .36 Boiling point K 1261
Atomic radius A 1 .42 Heat of vaporization kJ/mol 52 .55
Ionization Potential V 9 .009 Heat of fusion kJ/mol 17 .49
Electronegativity - 2 .1 Specific heat J/gK 0 .2
The oxide is mildly acidic.
Crystal are hexagonal.

Electron config. : [Kr] 4d10 5s2 5p4


Isotopes of Te: Click mass number for decay process, product for element page.


106
60 usec
a,4.320 MeV
Sn-102
105.93773
107
3.1 msec
a/EC,4.008
Sn-103/Sb-107
106.93505
108
2.1 sec
a/EC,6.800
Sn-104/Sb-108
107.92947
109
4.6 sec
a/EC,8.680
Sn-105/Sb-109
108.92746
110
18.6 sec
a/EC,5.250
Sn-106/Sb-110
109.92240
111
19.3 sec
EC/ECp,7.370
Sb-111/Sn-110
110.92111
112
2.0 min
EC,4.350 MeV
Sb-112
111.91705
113
1.7 min
EC,6.100 MeV
Sb-113
112.91592
114
15.2 min
EC,2.800 MeV
Sb-114
113.91205
115
5.8 min
EC,4.640 MeV
Sb-115
114.91158
116
2.49 hr
EC,1.510 MeV
Sb-116
115.90841
117
62 min
EC,3.535 MeV
Sb-117
116.90863
118
6.00 da
EC,3.907 MeV
Sb-118
117.90583
119
16.03 hr
EC,2.293 MeV
Sb-119
118.90640
120 0.096%

Stable

119.90402
121
16.78 da
EC,1.040 MeV
Sb-121
120.90492
122 2.603%

Stable

121.90305
123 0.908%
1E+13 yr
EC,1.429 MeV
Sb-123
122.90427
124 4.816%

Stable

123.90281
125 7.139%

Stable

124.90442
126 18.952%

Stable

125.90330
127
9.35 hr
B-,1.581 MeV
I-127
126.90521
128 31.687%
7.7E24 yr
2B-,4.380 MeV
Xe-128
127.90446
129
69.6 min
B-,1.498 MeV
I-129
128.90659
129a
33.6 da
B-,1.604 MeV
I-129
128.90670
130 33.799%
2.7E+21 yr
2B-,2.528 MeV
Xe-130
129.90622
131
25.0 min
B-,2.233 MeV
I-131
130.90852
132
3.204 da
B-,5.290 MeV
I-132
131.90852
133
12.5 min
B-,2.920 MeV
I-133
132.91093
134
41.8 min
B-,1.560 MeV
I-134
133.91155
135
19.0 sec
B-,5.960 MeV
I-135
134.91644
136
17.5 sec
B-/B-n,5.070
I-136/I-135
135.92010
137
2.49 sec
B-/B-n,6.940
I-137/I-136
136.92532
138
1.4 sec
B-/B-n,6.370
I-138/I-137
137.92922
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass