![[ATOM]](atom.gif) |
Tantalum
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Information valid for Ta-181 unless otherwise noted
Basic Information
Symbol: Ta
Atomic Number: 73
Mass: 180.9479
Melting Point: 2996.0 C
Boiling Point: 5425.0 C
Number of Protons/Electrons: 73
Number of Neutrons: 108
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 16.654 g/cm3
Color: gray
Atomic Structure
![[Bohr Model of Tantalum]](b0073.gif) |
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Number of Energy Levels: 6
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 32
Fifth Energy Level: 11
Sixth Energy Level: 2
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Isotopes
| Isotope |
Half Life |
| Ta-179 |
1.8 years |
| Ta-180 |
1.2E15 years |
| Ta-181 |
Stable |
| Ta-182 |
114.43 days |
Facts
Date of Discovery: 1802
Discoverer: Anders Ekeberg
Name Origin: After king Tantalus (Greek mythology)
Uses: capacitors, camera lenses
Obtained From: tantalite