![[ATOM]](atom.gif) |
Technetium
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Information valid for Tc-98 unless otherwise noted
Basic Information
Symbol: Tc
Atomic Number: 43
Mass: (98.0)
Melting Point: 2200.0 C
Boiling Point: 4877.0 C
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]](b0043.gif) |
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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
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Isotopes
| Isotope |
Half Life |
| Tc-95 |
20.0 hours |
| Tc-95m |
61.0 days |
| Tc-96 |
4.28 days |
| Tc-96m |
51.5 minutes |
| Tc-97 |
2600000.0 years |
| Tc-97m |
90.0 days |
| Tc-98 |
4200000.0 years |
| Tc-99 |
2.13E7 years |
| Tc-99m |
6.0 hours |
| Tc-100 |
14.2 minutes |
Facts
Date of Discovery: 1937
Discoverer: Carlo Perrier
Name Origin: From the Greek word technêtos (artificial)
Uses: Tc-99m is used for radioactive tracing in medicine
Obtained From: Man-made