Tellurium Element (Periodic Table)

Tellurium

Tellurium (Te) is a chemical element of the periodic table, located in the group 16 and the period 5, and has the atomic number 52. It is a brittle, lustrous, silvery-white metalloid, whose name comes from the Latin word “tellus”, which means Earth. It is a member of the chalcogen group.

group
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
period
1
1
H
2
He
2
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
3
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
4
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
5
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
6
55
Cs
56
Ba
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
7
87
Fr
88
Ra
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr
– p block

FAQs on Tellurium Element

Tellurium
‣ What does tellurium look like?

Appearance: silvery lustrous grey (crystalline), brown-black powder (amorphous)
‣ Who discovered tellurium? When was the element tellurium discovered?

Discovery: Franz-Joseph Müller von Reichenstein (1782)
First isolation: Martin Heinrich Klaproth
‣ Where is tellurium on the periodic table?

Tellurium Periodic Table

Location: Tellurium is found in the fifth row of the periodic table below the selenium element.
‣ What is the atomic number of tellurium?

Atomic number (Z): 52
‣ What is the symbol for tellurium?

Symbol: Te
Tellurium atomic weight: 127.60
‣ What block does tellurium belong to?

Block: p-block
‣ What group does tellurium belong to?

Group: 16 (chalcogens)
‣ What period is tellurium in on the periodic table?

Period: 5
‣ What is tellurium atomic radius?

Atomic radius: empirical: 140 pm
Tellurium covalent radius: 138±4 pm
Tellurium Van der Waals radius: 206 pm
‣ What is tellurium melting point?

Melting point: 722.66 K (449.51 °C, 841.12 °F)
‣ What is the boiling point of tellurium?

Boiling point: 1261 K (988 °C, 1810 °F)
‣ How many electron shells does tellurium have?

Electrons per shell: 2, 8, 18, 18, 6
‣ What is the ground-state electron configuration of tellurium?

Electron configuration: [Kr] 4d10 5s2 5p4
‣ What is the ionization energy of tellurium?

Ionization energies:
1st: 869.3 kJ/mol
2nd: 1790 kJ/mol
3rd: 2698 kJ/mol
‣ What is the phase of tellurium?

Phase (at r.t): solid
‣ What is the density of tellurium?

Density (near r.t): 6.24 g/cm3
when liquid (at m.p): 5.70 g/cm3
Tellurium magnetic ordering: diamagnetic
Tellurium natural occurrence: primordial
Tellurium oxidation state: -2, +2, +4, +6
‣ What’s the electronegativity of tellurium?

Electronegativity: Pauling scale: 2.1
Tellurium heat of fusion: 17.49 kJ/mol
Tellurium heat of vaporization: 114.1 kJ/mol
Tellurium molar heat capacity: 25.73 J/(mol K)
Tellurium molar magnetic susceptibility: -39.5 × 10-6 cm3/mol (298 K)
Speed of sound in tellurium: 2610 m/s (at 20 °C)
Tellurium crystal structure: trigonal
Thermal expansion of tellurium: 18 µm/(m.K) (at 25 °C)
Thermal conductivity of tellurium: 1.97-3.38 W/(m.K)
‣ Tellurium hardness

Mohs hardness: 2.25
Brinell hardness: 180-270 MPa
Young’s modulus of tellurium: 43 GPa
Shear modulus of tellurium: 16 GPa
Bulk modulus of tellurium: 65 GPa
Tellurium CAS number: 13494-80-9

‣ Tellurium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)(775)(888)10421266

‣ How many isotopes does tellurium have?

Main isotopes of tellurium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
120Te0.09 %stable
121Tesyn16.78 dε121Sb
122Te2.55 %stable
123Te0.89 %stable
124Te4.74 %stable
125Te7.07 %stable
126Te18.84 %stable
127Tesyn9.35 hβ127I
128Te31.74 %2.2 × 1024 yββ128Xe
129Tesyn69.6 minβ129I
130Te34.08 %7.9 × 1020 yββ130Xe

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