Tellurium
Symbol
Te
Atomic Number
52
Atomic Weight
127.6
Element Classification
Discovered By
Franz Joseph Meller von Reichenstein
Discovery Date
1782 (Romania)
Name Origin
Latin: tellus (earth).
Density(g/cc)
6.24
Melting Point
722.7
Boiling Point(K)
1263
Appearance
Silvery-white, brittle semimetal
Atomic Radius(pm)
160
Atomic Volume(cc/mol)
20.5
Covalent Radius(pm)
136
Ionic Radius
56 (+6e) 211 (-2e)
Specific Heat
0.201
Fusion Heat
17.91
Evaporation Heat(kj/mol)
49.8
Thermal Conductivity(@25°C W/m K)
14.3
Debye Temperature
n/a
Pauling Negativity Number
2.1
First Ionizing Energy(kj/mol)
869.0
Oxidation States
6, 4, 2
Electronic Configuration
[Kr] 4d10 5s2 5p4
Lattice Structure
Hexagonal(HEX)
Lattice Constant
4.450
Lattice C/A Ratio
1.330
