![[ATOM]](atom.gif) |
Gadolinium
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Information valid for Gd-157 unless otherwise noted
Basic Information
Symbol: Gd
Atomic Number: 64
Mass: 157.25
Melting Point: 1311.0 C
Boiling Point: 3233.0 C
Number of Protons/Electrons: 64
Number of Neutrons: 93
Classification: Rare Earth
Crystal Structure: Hexagonal
Density @ 293 K: 7.895 g/cm3
Color: Silverish
Atomic Structure
![[Bohr Model of Gadolinium]](b0064.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: 25
Fifth Energy Level: 9
Sixth Energy Level: 2
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Isotopes
| Isotope |
Half Life |
| Gd-148 |
75.0 years |
| Gd-150 |
1800000.0 years |
| Gd-151 |
124.0 days |
| Gd-152 |
1.1E14 years |
| Gd-153 |
241.6 days |
| Gd-154 |
Stable |
| Gd-155 |
Stable |
| Gd-156 |
Stable |
| Gd-157 |
Stable |
| Gd-158 |
Stable |
| Gd-159 |
18.6 hours |
| Gd-160 |
Stable |
| Gd-162 |
8.4 minutes |
Facts
Date of Discovery: 1880
Discoverer: Jean de Marignac
Name Origin: gadolinite (mineral)
Uses: magnetic
Obtained From: gadolinite