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
Crystal Structure: Hexagonal
Density @ 293 K: 11.5 g/cm3
Color: Unknown
Atomic Structure
![[Bohr Model of Technetium]](b0043.gif) |
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 |
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: 1937Discoverer: Carlo Perrier
Name Origin: From the Greek word technętos (artificial)
Uses: Tc-99m is used for radioactive tracing in medicine
Obtained From: Man-made
Information provided by: http://www.chemicalelements.com