52 - Tellurium metalloid
Discovered by Franz von Reichenstein in 1782
Tellurium is a chemical element with symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur.
Periodic table
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 8 | 2 in 2s + 6 in 2p |
| 3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
| 4 | 18 | 2 in 4s + 6 in 4p + 10 in 4d |
| 5 | 6 | 2 in 5s + 4 in 5p |
Electron shells
128 u Atomic Mass
1.4 Å Atomic Radius
1.26k K Boiling Point
16 Group
-2, 2, 4, 6 Common Oxidation States
1.38 Å Covalent Radius
6.24 g/cm³ Density
190 kJ/mol Electron Affinity
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p4 Electron Configuration
[Kr] 4d10 5s2 5p4 Electron Configuration (semantic)
2.1 Electronegativity
52 Electrons
9.01 eV First Ionization Energy
-2, -1, 4, 6 ICSD Oxidation States
869.3, 1790, 2698, 3610, 5668, 6820, 13200 kJ/mol Ionization Energies
723 K Melting Point
92 Mendeleev Number
25.7 J/(mol·K) Molar Heat
5 Number of Shells
6 Electron Valency
76 Neutrons
52 Atomic Number
29 Number of Isotopes
-2, 2, 4, 5, 6 Oxidation States
5 Period
Solid Phase
52 Protons
2, 8, 18, 18, 6 Electron Shell Occupations