Tellurium (Te)

Tellurium is the 52nd element in the periodic table and has a symbol of Te and atomic number of 52. It has an atomic weight of 127.60 and a mass number of 130. Tellurium has fifty-two protons and seventy-eight neutrons in its nucleus, and fifty-two electrons in five shells. It is located in group sixteen, period five and block p of the periodic table. Silvery metalloid element of group 16. Eight natural isotopes, nine radioactive isotopes. Used in semiconductors and to a degree in some steels. Chemistry is similar to Sulphur. Discovered in 1782 by Franz Miller.

Atomic Number	52
Atomic Weight	127.6
Mass Number	130

Group	16
Period	5
Block	p

Protons	52 p⁺
Neutrons	78 n⁰
Electrons	52 e^-

Properties

Physical Properties
Atomic Radius	140 pm 242 pm
Molar Volume	20.5 cm³/mol
Covalent Radius	136 pm 128 pm 121 pm 133 pm 138 pm
Metallic Radius	137 pm 160 pm
Ionic Radius	221 pm 52 pm 66 pm 97 pm 43 pm 56 pm
Crystal Radius	207 pm 66 pm 80 pm 111 pm 57 pm 70 pm
Van der Waals Radius	210 pm 206 pm 423 pm 206 pm 244 pm 447 pm
Density	6.232 g/cm³ 5,700 kg/m³
Energy
Proton Affinity
Electron Affinity	1.970876 eV/particle
Ionization Energy	9.00966 eV/particle 19 eV/particle 27.838 eV/particle 37.4155 eV/particle 59.25 eV/particle 69.1 eV/particle 124.201 eV/particle 143 eV/particle 167 eV/particle 191.1 eV/particle 215 eV/particle 245 eV/particle 272 eV/particle 299 eV/particle 328 eV/particle 354 eV/particle 461 eV/particle 491 eV/particle 522 eV/particle 555 eV/particle 599 eV/particle 633 eV/particle 709 eV/particle 746.12 eV/particle 1,304 eV/particle 1,377 eV/particle 1,455 eV/particle 1,538 eV/particle 1,618 eV/particle 1,707 eV/particle 1,803 eV/particle 1,889 eV/particle 1,979 eV/particle 2,066 eV/particle 2,309 eV/particle 2,386 eV/particle 2,472 eV/particle 2,552 eV/particle 2,700 eV/particle 2,788 eV/particle 2,954 eV/particle 3,041 eV/particle 7,022 eV/particle 7,243 eV/particle 7,485 eV/particle 7,714 eV/particle 8,240 eV/particle 8,499 eV/particle 8,821 eV/particle 9,040.83 eV/particle 37,196.52 eV/particle 38,177.56 eV/particle

Heat of Vaporization	49.8 kJ/mol
Heat of Fusion	17.91 kJ/mol
Heat of Formation	196.6 kJ/mol
Electrons
Electron Shells	2, 8, 18, 18, 6

Valence Electrons	6 ⓘ

Electron Configuration	[Kr] 4d¹⁰ 5s² 5p⁴ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d¹⁰ 5s² 5p⁴

Oxidation States	-2, -1, 0, 1, 2, 3, 4, 5, 6
Electronegativity	12.76 eV/particle 0.2056992 2.1
Electrophilicity Index	2.141210947219293 eV/particle
States of Matter
Phase	Solid
Gas Phase
Boiling Point	1,261.15 K
Melting Point	722.66 K
Critical Pressure
Critical Temperature	2,329.15 K
Triple Point
Visual
Tellurium is a Silver. Te has a CPK of #ff1493, Jmol of #d47a00, and MOLCAS GV of #d47a00. The Refractive Index of Element 52 is 1.000991.
Color	Silver #ff1493 #d47a00 #d47a00
Appearance
Refractive Index	1.000991
Thermodynamic Properties
Thermal Conductivity	14.3 W/(m K)
Thermal Expansion
Molar Heat Capacity	25.73 J/(mol K)
Specific Heat Capacity	0.202 J/(g⋅K)
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type	Semiconductor
Electrical Conductivity	0.01 MS/m
Electrical Resistivity	0.0001 m Ω
Superconducting Point
Magnetism
Type	diamagnetic
Magnetic Susceptibility (Mass)	-0.0000000039 m³/Kg
Magnetic Susceptibility (Molar)	-0.000000000498 m³/mol
Magnetic Susceptibility (Volume)	-0.0000243
Magnetic Ordering
Curie Point
Neel Point
Structure
The Crystal Structure of Tellurium is HEX. The lattice constant of Te is 4.45 Å. The lattice angles of Element 52 are π/2, π/2, 2 π/3.
Crystal Structure	Simple Trigonal (HEX)
Lattice Constant	4.45 Å
Lattice Angles	π/2, π/2, 2 π/3
Mechanical Properties
Tellurium has a Brinell of 180 MPa, and Mohs hardness of 2.25 MPa. The Bulk Modulus of Te is 65 GPa. The Shear Modulus of Element 52 is 16 GPa. The Young Modulus of Tellurium (Te) is 43 GPa. The Speed of Sound of Tellurium is 2610 m/s.
Hardness	180 MPa 2.25 MPa
Bulk Modulus	65 GPa
Shear Modulus	16 GPa
Young's Modulus	43 GPa
Poisson Ratio
Speed of Sound	2,610 m/s
Classification
The CAS Group of Tellurium is VIB. The IUPAC Group of Te is VIA. The Glawe Number of Element 52 is 94. The Mendeleev Number of Tellurium (Te) is 102. The Pettifor Number of Tellurium is 92. The Geochemical Class of Te is semi-volatile. The Goldschmidt Class of Element 52 is chalcophile.
Category	Metalloids, Metalloids
CAS Group	VIB
IUPAC Group	VIA
Glawe Number	94
Mendeleev Number	102
Pettifor Number	92
Geochemical Class	semi-volatile
Goldschmidt Class	chalcophile
Other
The Dipole Polarizability of Tellurium is 38 plus or minus 4 a₀. Te has a C6 Dispersion Coefficient (CD) of 445 a₀, and C6 Dispersion Coefficient (GB) of 471 a₀. The Allotropes of Element 52 is . The Neutron Cross Section of Tellurium (Te) is 5.4. The Neutron Mass Absorption of Tellurium is 0.0013. The Quantum Numbers of Te is 3P2. The Space Group of Element 52 is 152 (P3121).
Gas Basicity
Dipole Polarizability	38 ± 4 a₀
C6 Dispersion Coefficient	445 a₀ 471 a₀
Allotropes
Neutron Cross Section	5.4
Neutron Mass Absorption	0.0013
Quantum Numbers	3P2
Space Group	152 (P3121)

Isotopes of Tellurium

Stable Isotopes	4
Unstable Isotopes	38
Radioactive Isotopes	38

¹⁰⁴Te

Mass Number	104
Neutron Number	52
Relative Atomic Mass	103.946723408 ± 0.000340967 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2018
Parity	+

Decay Mode	Intensity
α (α emission)	100%

¹⁰⁵Te

Mass Number	105
Neutron Number	53
Relative Atomic Mass	104.943304516 ± 0.000322084 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	633 ± 66 ns
Spin	7/2
Quadrupole Moment
Discovery Year	2006
Parity	+

Decay Mode	Intensity
α (α emission)	100%

¹⁰⁶Te

Mass Number	106
Neutron Number	54
Relative Atomic Mass	105.937498521 ± 0.000107934 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	78 ± 11 us
Spin	0
Quadrupole Moment	0
Discovery Year	1981
Parity	+

Decay Mode	Intensity
α (α emission)	100%

¹⁰⁷Te

Mass Number	107
Neutron Number	55
Relative Atomic Mass	106.934882 ± 0.000108 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	3.22 ± 0.09 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1979
Parity	+

Decay Mode	Intensity
α (α emission)	70%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)

¹⁰⁸Te

Mass Number	108
Neutron Number	56
Relative Atomic Mass	107.929380469 ± 0.000005808 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.1 ± 0.1 s
Spin	0
Quadrupole Moment	0
Discovery Year	1974
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	51%
α (α emission)	49%
β⁺ p (β⁺-delayed proton emission)	2.4%
β⁺α (β⁺-delayed α emission)	0.065%

¹⁰⁹Te

Mass Number	109
Neutron Number	57
Relative Atomic Mass	108.927304532 ± 0.000004704 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.4 ± 0.2 s
Spin	5/2
Quadrupole Moment
Discovery Year	1967
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	96.1%
α (α emission)	3.9%
β⁺ p (β⁺-delayed proton emission)	9.4%
β⁺α (β⁺-delayed α emission)	0.0049%

¹¹⁰Te

Mass Number	110
Neutron Number	58
Relative Atomic Mass	109.922458102 ± 0.000007058 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	18.6 ± 0.8 s
Spin	0
Quadrupole Moment	0
Discovery Year	1977
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)

¹¹¹Te

Mass Number	111
Neutron Number	59
Relative Atomic Mass	110.921000587 ± 0.0000069 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	26.2 ± 0.6 s
Spin	5/2
Quadrupole Moment
Discovery Year	1967
Parity

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

¹¹²Te

Mass Number	112
Neutron Number	60
Relative Atomic Mass	111.916727848 ± 0.000009 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	2 ± 0.2 m
Spin	0
Quadrupole Moment	0
Discovery Year	1976
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹³Te

Mass Number	113
Neutron Number	61
Relative Atomic Mass	112.915891 ± 0.00003 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.7 ± 0.2 m
Spin	7/2
Quadrupole Moment
Discovery Year	1974
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹⁴Te

Mass Number	114
Neutron Number	62
Relative Atomic Mass	113.91208782 ± 0.000026224 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	15.2 ± 0.7 m
Spin	0
Quadrupole Moment	0
Discovery Year	1968
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹⁵Te

Mass Number	115
Neutron Number	63
Relative Atomic Mass	114.911902 ± 0.00003 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	5.8 ± 0.2 m
Spin	7/2
Quadrupole Moment
Discovery Year	1961
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹⁶Te

Mass Number	116
Neutron Number	64
Relative Atomic Mass	115.908465558 ± 0.000025986 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.49 ± 0.04 h
Spin	0
Quadrupole Moment	0
Discovery Year	1958
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹⁷Te

Mass Number	117
Neutron Number	65
Relative Atomic Mass	116.908646227 ± 0.000014444 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	62 ± 2 m
Spin	1/2
Quadrupole Moment	0
Discovery Year	1958
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
ϵ (electron capture)	75%
e⁺ (positron emission)	25%

¹¹⁸Te

Mass Number	118
Neutron Number	66
Relative Atomic Mass	117.905860104 ± 0.000019652 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	6 ± 0.02 d
Spin	0
Quadrupole Moment	0
Discovery Year	1948
Parity	+

Decay Mode	Intensity
ϵ (electron capture)	100%

¹¹⁹Te

Mass Number	119
Neutron Number	67
Relative Atomic Mass	118.906405699 ± 0.000007813 Da
G-Factor	0.5 ± 0.1
Abundance
Radioactivity	☢️ Radioactive
Half Life	16.05 ± 0.05 h
Spin	1/2
Quadrupole Moment	0
Discovery Year	1948
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
ϵ (electron capture)	97.94%
e⁺ (positron emission)	2.06%

¹²⁰Te

Mass Number	120
Neutron Number	68
Relative Atomic Mass	119.904065779 ± 0.00000188 Da
G-Factor	0
Abundance	0.09 ± 0.01
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1936
Parity	+

Decay Mode	Intensity
2β⁺ (double β⁺ decay)

¹²¹Te

Mass Number	121
Neutron Number	69
Relative Atomic Mass	120.904945065 ± 0.000027734 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	19.31 ± 0.07 d
Spin	1/2
Quadrupole Moment	0
Discovery Year	1939
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹²²Te

Mass Number	122
Neutron Number	70
Relative Atomic Mass	121.903044708 ± 0.000001456 Da
G-Factor	0
Abundance	2.55 ± 0.12
Radioactivity	Stable
Half Life	Not Radioactive ☢️
Spin	0
Quadrupole Moment	0
Discovery Year	1932
Parity	+

¹²³Te

Mass Number	123
Neutron Number	71
Relative Atomic Mass	122.904271022 ± 0.000001454 Da
G-Factor
Abundance	0.89 ± 0.03
Radioactivity	☢️ Radioactive
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year	1932
Parity	+

Decay Mode	Intensity
ϵ (electron capture)	100%

¹²⁴Te

Mass Number	124
Neutron Number	72
Relative Atomic Mass	123.902818341 ± 0.000001451 Da
G-Factor	0
Abundance	4.74 ± 0.14
Radioactivity	Stable
Half Life	Not Radioactive ☢️
Spin	0
Quadrupole Moment	0
Discovery Year	1932
Parity	+

¹²⁵Te

Mass Number	125
Neutron Number	73
Relative Atomic Mass	124.904431178 ± 0.000001451 Da
G-Factor
Abundance	7.07 ± 0.15
Radioactivity	Stable
Half Life	Not Radioactive ☢️
Spin	1/2
Quadrupole Moment	0
Discovery Year	1931
Parity	+

¹²⁶Te

Mass Number	126
Neutron Number	74
Relative Atomic Mass	125.903312144 ± 0.000001453 Da
G-Factor	0
Abundance	8.84 ± 0.25
Radioactivity	Stable
Half Life	Not Radioactive ☢️
Spin	0
Quadrupole Moment	0
Discovery Year	1924
Parity	+

¹²⁷Te

Mass Number	127
Neutron Number	75
Relative Atomic Mass	126.905226993 ± 0.000001465 Da
G-Factor	0.42333333333333 ± 0.0026666666666667
Abundance
Radioactivity	☢️ Radioactive
Half Life	9.35 ± 0.07 h
Spin	3/2
Quadrupole Moment
Discovery Year	1938
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²⁸Te

Mass Number	128
Neutron Number	76
Relative Atomic Mass	127.904461237 ± 0.000000758 Da
G-Factor	0
Abundance	31.74 ± 0.08
Radioactivity	☢️ Radioactive
Half Life	2.25 ± 0.09 Yy
Spin	0
Quadrupole Moment	0
Discovery Year	1924
Parity	+

Decay Mode	Intensity
2β⁻ (double β⁻ decay)	100%

¹²⁹Te

Mass Number	129
Neutron Number	77
Relative Atomic Mass	128.906596419 ± 0.000000763 Da
G-Factor	0.468 ± 0.0026666666666667
Abundance
Radioactivity	☢️ Radioactive
Half Life	69.6 ± 0.3 m
Spin	3/2
Quadrupole Moment	0.055 ± 0.013
Discovery Year	1939
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³⁰Te

Mass Number	130
Neutron Number	78
Relative Atomic Mass	129.906222745 ± 0.000000011 Da
G-Factor	0
Abundance	34.08 ± 0.62
Radioactivity	☢️ Radioactive
Half Life	791 ± 21 Ey
Spin	0
Quadrupole Moment	0
Discovery Year	1924
Parity	+

Decay Mode	Intensity
2β⁻ (double β⁻ decay)	100%

¹³¹Te

Mass Number	131
Neutron Number	79
Relative Atomic Mass	130.90852221 ± 0.000000065 Da
G-Factor	0.464 ± 0.006
Abundance
Radioactivity	☢️ Radioactive
Half Life	25 ± 0.1 m
Spin	3/2
Quadrupole Moment
Discovery Year	1939
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³²Te

Mass Number	132
Neutron Number	80
Relative Atomic Mass	131.908546713 ± 0.000003742 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	3.204 ± 0.013 d
Spin	0
Quadrupole Moment	0
Discovery Year	1948
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³³Te

Mass Number	133
Neutron Number	81
Relative Atomic Mass	132.91096333 ± 0.000002218 Da
G-Factor	0.56666666666667 ± 0.013333333333333
Abundance
Radioactivity	☢️ Radioactive
Half Life	12.5 ± 0.3 m
Spin	3/2
Quadrupole Moment	0.23 ± 0.09
Discovery Year	1940
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³⁴Te

Mass Number	134
Neutron Number	82
Relative Atomic Mass	133.911396376 ± 0.000002948 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	41.8 ± 0.8 m
Spin	0
Quadrupole Moment	0
Discovery Year	1948
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³⁵Te

Mass Number	135
Neutron Number	83
Relative Atomic Mass	134.916554715 ± 0.000001848 Da
G-Factor	-0.19714285714286 ± 0.014285714285714
Abundance
Radioactivity	☢️ Radioactive
Half Life	19 ± 0.2 s
Spin	7/2
Quadrupole Moment	0.29 ± 0.09
Discovery Year	1969
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³⁶Te

Mass Number	136
Neutron Number	84
Relative Atomic Mass	135.92010118 ± 0.000002448 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	17.63 ± 0.09 s
Spin	0
Quadrupole Moment	0
Discovery Year	1974
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1.37%

¹³⁷Te

Mass Number	137
Neutron Number	85
Relative Atomic Mass	136.925599354 ± 0.000002254 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.49 ± 0.05 s
Spin	3/2
Quadrupole Moment
Discovery Year	1975
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2.94%

¹³⁸Te

Mass Number	138
Neutron Number	86
Relative Atomic Mass	137.929472452 ± 0.000004065 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.46 ± 0.25 s
Spin	0
Quadrupole Moment	0
Discovery Year	1975
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	4.8%

¹³⁹Te

Mass Number	139
Neutron Number	87
Relative Atomic Mass	138.935367191 ± 0.0000038 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	724 ± 81 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1994
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁴⁰Te

Mass Number	140
Neutron Number	88
Relative Atomic Mass	139.939487057 ± 0.000015434 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	351 ± 5 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1994
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁴¹Te

Mass Number	141
Neutron Number	89
Relative Atomic Mass	140.945604 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	193 ± 16 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1994
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹⁴²Te

Mass Number	142
Neutron Number	90
Relative Atomic Mass	141.950027 ± 0.000537 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	147 ± 8 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1994
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹⁴³Te

Mass Number	143
Neutron Number	91
Relative Atomic Mass	142.956489 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	120 ± 8 ms
Spin	7/2
Quadrupole Moment
Discovery Year	2010
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹⁴⁴Te

Mass Number	144
Neutron Number	92
Relative Atomic Mass	143.961116 ± 0.000322 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	93 ± 60 ms
Spin	0
Quadrupole Moment	0
Discovery Year	2015
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹⁴⁵Te

Mass Number	145
Neutron Number	93
Relative Atomic Mass	144.967783 ± 0.000322 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2018
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

History

Tellurium was discovered in Transylvania in 1782 by Franz-Joseph Müller von Reichenstein in a mineral containing tellurium and gold. In 1789, another Hungarian scientist, Pál Kitaibel, also discovered the element independently in an ore from Deutsch-Pilsen which had been regarded as argentiferous molybdenite. In 1798, it was named by Martin Heinrich Klaproth who earlier isolated it from the mineral calaverite. From the Latin word tellus, earth

Discoverers	Franz Müller von Reichenstein
Discovery Location	Romania
Discovery Year	1782
Etymology (Name Origin)	Latin: tellus (earth).
Pronunciation	te-LOOR-i-em (English)

Tellurium and tellurium compounds are considered to be mildly toxic

In air, tellurium burns with a greenish-blue flames, forming the dioxide

Uses

The primary use of tellurium is in alloys, foremost in steel and copper to improve machinability. Tellurium is used as a basic ingredient in blasting caps, and is added to cast iron for chill control. It is used in vulcanizing rubber and in catalysts for petroleum cracking. Tellurium is used as a coloring agent in ceramics. Used to improve the machining quality of copper and stainless steel products and to color glass and ceramics. Also in thermoelectric devices. Some is used in the rubber industry and it is a basic ingredient in manufacturing blasting caps.

Sources

Obtained as a by-product of copper and lead refining.

Abundance
Abundance in Earth's crust	0.001 mg/kg
Natural Abundance (Oceans)
Natural Abundance (Human Body)
Natural Abundance (Meteor)	0.00021 %
Natural Abundance (Sun)
Abundance in Universe	0.0000009 %

Nuclear Screening Constants

1	s	1.0432
2	p	4.14
2	s	13.6688
3	d	14.1607
3	p	17.9911
3	s	18.0019
4	d	32.04
4	p	28.878
4	s	27.5916
5	p	41.1915
5	s	39.462

Also Known As

Te
element 52
52Te

Translations

Norwegian Bokmåltellur
Frenchtellure
Italiantellurio
Spanishtelurio
Norwegian Nynorsktellur
Danishtellur
Swedishtellur
GermanTellur
Hungariantellúr
Polishtellur
Russianтеллур
Afrikaanstelluur
Amharicቴሉሪየም
AragoneseTelurio
Arabicتيلوريوم
AzerbaijaniTellur
BelarusianТэлур
Bulgarianтелур
Banglaটেলুরিয়াম
BretonTelluriom
Bosniantelur
Catalantel·luri
CorsicanTelluriu
Czechtellur
ChuvashТеллур
WelshTelwriwm
Greekτελλούριο
Esperantoteluro
EstonianTelluur
Basquetelurio
Persianتلوریم
Finnishtelluuri
FriulianTeluri
IrishTeallúiriam
Galiciantelurio
ManxÇhellurium
Hakka Chinesetellurium
Hebrewטלור
Hindiटेलुरियम
Fiji HindiTellurium
CroatianTelurij
Armenianտելուր
Interlinguatellurium
Indonesiantelurium
Idotelurio
Icelandictellúr
Japaneseテルル
Lojbantedjicmu
JavaneseTelurium
Georgianტელური
Kannadaಟೆಲ್ಲುರಿಯಮ್
Korean텔루륨
KomiТеллур
Latintellurium
LuxembourgishTellur
LigurianTellurio
LithuanianTelūras
Latviantelūrs
Malayalamടെലൂറിയം
Marathiटेलरियम
Western MariТеллур
MalayTelurium
Burmeseတယ်လူရီယမ်
Low GermanTellur
Dutchtelluur
OccitanTelluri
Punjabiਟੈਲਿਊਰੀਅਮ
pnbٹیلوریم
Portuguesetelúrio
QuechuaTeluryu
Romaniantelur
Siciliantilluriu
Serbo-CroatianTelur
Slovaktelúr
SlovenianTelur
Serbianтелур
Saterland FrisianTellur
SwahiliTeluri
Tamilடெலூரியம்
Thaiเทลลูเรียม
TurkishTellür
UkrainianТелур
UzbekTellur
VepsTellur
Vietnamesetelua
WarayTeluryo
KalmykТеллур
Yiddishטעלור
YorubaTellurium
Chinese碲
KazakhТеллур
CebuanoTeluryo
Macedonianтелур
Central Kurdishتێلوریۆم
Odiaଟେଲୁରିଅମ
Gujaratiટેલુરિયમ
PiedmonteseTeluri
TatarТеллур
Scotstellurium
SomaliTeluriyaam
ErzyaТеллур
Cantonese碲
Belarusian (Taraskievica orthography)Тэлюр
AlbanianTeluri
AromanianTeluru
KyrgyzТеллур
LimburgishTelluur
cdoDá̤
FaroeseTellur
Newariटेलुरियम
Sanskritटेलुरियम
LombardTelurio
Maltesetellurju
AsturianTeluriu
Scottish GaelicTelurium
Nepaliटेलुरियम
TajikТеллур
Paliटेलुरियम
Teluguటెలూరియం
Min Nan ChineseTellurium
SundaneseTelurium
Bhojpuriटेल्यूरियम
Tibetanཊེ་ལུ་རིམ།
Portuguese (Brazil)telúrio
Literary Chinese碲
TagalogTeluryo
kbpTeluuri
Mongolianтеллур
Lingua Franca Novatelurio
oloTellur
Wu Chinese碲
Northern FrisianTeluur
Chinese (Traditional)碲
Chinese (Taiwan)碲
Uyghurتېللۇر
Chinese (Simplified)碲
SardinianTellùriu
Moroccan Arabicتيلوريوم
BashkirТеллур
Egyptian Arabicتيلوريوم
Pashtoتېلوريوم
bclTeluryo
CornishTeloriom
BalineseTéllurium
Urduٹیلوریئم

Tellurium on ChemicalAid

Australian Educational Vocabulary ID	scot/3582
BNCF Thesaurus ID	41689
Biblioteca Nacional de España ID	XX530277
Bibliothèque nationale de France ID	12138330x
Brockhaus Enzyklopädie online ID	te
CAB ID	266885
CAS Registry Number	13494-80-9
ChEBI ID	30452
ChemSpider ID	4885717
DSSTOX compound identifier	DTXCID7012119
DSSTox substance ID	DTXSID9032119
Den Store Danske ID	tellur
ECHA Substance Infocard ID	100.033.452
Encyclopædia Britannica Online ID	science/tellurium
Encyclopædia Universalis ID	tellure
Freebase ID	/m/025sk5w
GND ID	4184665-5
Gran Enciclopèdia Catalana ID	0145393
Great Russian Encyclopedia Online ID	4186445
HSDB ID	2532
Human Metabolome Database ID	HMDB0001854
ICSC ID	0986
InChI	InChI=1S/Te
InChIKey	PORWMNRCUJJQNO-UHFFFAOYSA-N
KBpedia ID	Tellurium
Library of Congress authority ID	sh85133642
MeSH descriptor ID	D013691
Mindat mineral ID	37792
NALT ID	55169
NDL Authority ID	00572907
NKCR AUT ID	ph126528
Namuwiki ID	텔루륨
National Library of Israel J9U ID	987007565705505171
OmegaWiki Defined Meaning	160178
Online PWN Encyclopedia ID	3986271
OpenAlex ID	C538181303
PSH ID	5809
PubChem CID	6327182
RxNorm ID	1311384
Store norske leksikon ID	tellur
Treccani ID	tellurio
UNII	NQA0O090ZJ
USGS Thesaurus ID	1589
Wolfram Language entity code	Entity["Mineral", "Tellurium"]
WordNet 3.1 Synset ID	14681407-n
YSO ID	22857
ZVG number	7520

Tellurium (Te)

Properties

Isotopes of Tellurium

104Te

105Te

106Te

107Te

108Te

109Te

110Te

111Te

112Te

113Te

114Te

115Te

116Te

117Te

118Te

119Te

120Te

121Te

122Te

123Te

124Te

125Te

126Te

127Te

128Te

129Te

130Te

131Te

132Te

133Te

134Te

135Te

136Te

137Te

138Te

139Te

140Te

141Te

142Te

143Te

144Te

145Te