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Basic Information
Name: Dysprosium
Symbol: Dy
Atomic Number: 66
Atomic Mass: 162.5 amu
Melting Point: 1412.0 °C (1685.15 °K, 2573.6 °F)
Boiling Point: 2562.0 °C (2835.15 °K, 4643.6 °F)
Number of Protons/Electrons: 66
Number of Neutrons: 97
Classification: Rare Earth
Crystal Structure: Hexagonal
Density @ 293 K: 8.536 g/cm3
Color: Unknown
Atomic Structure
![[Bohr Model of Dysprosium]](Chemical Elements_com - Dysprosium (Dy)_files/b0066.gif) |
Number of Energy Levels: 6 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 18 Fourth Energy Level: 28 Fifth Energy Level: 8 Sixth Energy Level: 2 |
Isotopes
| Isotope | Half Life |
| Dy-154 | 3000000.0 years |
| Dy-156 | Stable |
| Dy-157 | 8.1 hours |
| Dy-158 | Stable |
| Dy-159 | 144.4 days |
| Dy-160 | Stable |
| Dy-161 | Stable |
| Dy-162 | Stable |
| Dy-163 | Stable |
| Dy-164 | Stable |
| Dy-165 | 2.3 hours |
| Dy-166 | 3.4 days |
Facts
Date of Discovery: 1886
Discoverer: Paul Emile Lecoq de Boisbaudran
Name Origin: From the Greek word dysprositos (hard to get at)
Uses: nuclear reactors
Obtained From: erbium, holmium