66 - Dysprosium lanthanide
Discovered by Lecoq de Boisbaudran in 1886
Dysprosium is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in various minerals, such as xenotime.
Periodic table
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 8 | 2 in 2s + 6 in 2p |
| 3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
| 4 | 28 | 2 in 4s + 6 in 4p + 10 in 4d + 10 in 4f |
| 5 | 8 | 2 in 5s + 6 in 5p |
| 6 | 2 | 2 in 6s |
Electron shells
silvery white Appearance
163 u Atomic Mass
1.75 Å Atomic Radius
2.84k K Boiling Point
12 Group
3 Common Oxidation States
1.92 Å Covalent Radius
8.54 g/cm³ Density
34 kJ/mol Electron Affinity
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f10 Electron Configuration
[Xe] 4f10 6s2 Electron Configuration (semantic)
1.22 Electronegativity
66 Electrons
5.94 eV First Ionization Energy
3 ICSD Oxidation States
573, 1130, 2200, 3990 kJ/mol Ionization Energies
1.68k K Melting Point
24 Mendeleev Number
27.7 J/(mol·K) Molar Heat
6 Number of Shells
97 Neutrons
66 Atomic Number
21 Number of Isotopes
2, 3 Oxidation States
6 Period
Solid Phase
66 Protons
2, 8, 18, 28, 8, 2 Electron Shell Occupations