![[ATOM]](atom.gif) |
Terbium
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Information valid for Tb-159 unless otherwise noted
Basic Information
Symbol: Tb
Atomic Number: 65
Mass: 158.92534
Melting Point: 1360.0 C
Boiling Point: 3041.0 C
Number of Protons/Electrons: 65
Number of Neutrons: 94
Classification: Rare Earth
Crystal Structure: Hexagonal
Density @ 293 K: 8.27 g/cm3
Color: silverish
Atomic Structure
![[Bohr Model of Terbium]](b0065.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: 27
Fifth Energy Level: 8
Sixth Energy Level: 2
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Isotopes
| Isotope |
Half Life |
| Tb-151 |
17.61 hours |
| Tb-155 |
5.3 days |
| Tb-156 |
5.3 days |
| Tb-157 |
110.0 years |
| Tb-158 |
180.0 years |
| Tb-159 |
Stable |
| Tb-160 |
72.3 days |
| Tb-161 |
6.91 days |
| Tb-162 |
7.6 minutes |
Facts
Date of Discovery: 1843
Discoverer: Carl Mosander
Name Origin: Ytterby (a town in Sweden)
Uses: in color TV's
Obtained From: with other rare earths