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

Basic Information

Name: Technetium
Symbol: Tc
Atomic Number: 43
Atomic Mass: (98.0) amu
Melting Point: 2200.0 °C (2473.15 K, 3992.0 °F)
Boiling Point: 4877.0 °C (5150.15 K, 8810.6 °F)
Number of Protons/Electrons: 43
Number of Neutrons: 55
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 11.5 g/cm3
Color: Unknown

Atomic Structure

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

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 14
    Fifth Energy Level: 1


Isotope Half Life
Tc-9520.0 hours
Tc-95m61.0 days
Tc-964.28 days
Tc-96m51.5 minutes
Tc-972600000 years
Tc-97m90.0 days
Tc-984200000 years
Tc-992.13E5 years
Tc-99m6.0 hours
Tc-10014.2 minutes


Date of Discovery: 1937
Discoverer: Carlo Perrier
Name Origin: From the Greek word technÍtos (artificial)
Uses: Tc-99m is used for radioactive tracing in medicine
Obtained From: Man-made

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Bentor, Yinon. Chemical Element.com - Technetium. <http://www.chemicalelements.com/elements/tc.html>.

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