66Dy162.500
Lanthanidef-block
Dysprosium
Element 66 on the periodic table, symbol Dy, group 3, period 6.
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.
Appearance: silvery white
Properties
- Atomic Number
- 66
- Atomic Mass
- 162.5001 u
- Group
- 3
- Period
- 6
- Block
- f-block
- Category
- Lanthanide
- State at 25 °C
- Solid
- Melting Point
- 1,680 K · 1,406.9 °C
- Boiling Point
- 2,840 K · 2,566.9 °C
- Density
- 8.54 g/cm³
- Atomic Radius
- 175 pm
- Electronegativity
- 1.22
- Oxidation States
- +3
- Abundance in Crust
- 5.2 mg/kg
- Discovered
- 1886
- Discovered By
- Lecoq de Boisbaudran
Electron Configuration
[Xe] 4f10 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f10
Ionisation Energies (kJ/mol)
- 1. 573
- 2. 1,130
- 3. 2,200
- 4. 3,990
Elements near Dysprosium
Elements in the same group share the number of outer electrons and behave in similar ways. Elements in the same period share a shell, so they change steadily from left to right.