Mendeleev's Periodic Table > Te - Tellurium

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:

MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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

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