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Tellurium at Chemical Elements.com
Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page

Basic Information

Name: Tellurium
Symbol: Te
Atomic Number: 52
Atomic Mass: 127.6 amu
Melting Point: 449.5 °C (722.65 K, 841.1 °F)
Boiling Point: 989.8 °C (1262.95 K, 1813.64 °F)
Number of Protons/Electrons: 52
Number of Neutrons: 76
Classification: Metalloid
Crystal Structure: Hexagonal
Density @ 293 K: 6.24 g/cm3
Color: silverish

Atomic Structure

[Bohr Model of Tellurium]  
Number of Energy Levels: 5

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 18
    Fifth Energy Level: 6


Isotope Half Life
Te-1194.69 days
Te-12116.8 days
Te-121m154.0 days
Te-1231.3E12 years
Te-123m119.7 days
Te-125m58.0 days
Te-1279.4 hours
Te-127m109.0 days
Te-1291.16 hours
Te-129m33.6 days
Te-1302.5E21 years
Te-13125.0 minutes
Te-131m1.35 days
Te-1323.26 days
Te-13312.4 minutes
Te-133m55.4 minutes
Te-13441.8 minutes


Date of Discovery: 1782
Discoverer: Franz Muller von Reichenstein
Name Origin: From the Greek word tellus (Earth)
Uses: coloring of glass and ceramics, thermoelectric devices
Obtained From: by-product of refining of lead and copper

Related Links

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MLA Format for Citing This Page

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