Atomic Element Z = 66 • Lanthanide
Dysprosium (Dy) — Atomic Data, Electron Shells & Reactions
Dysprosium (symbol Dy, atomic number 66) has a standard atomic weight of 162.5 u and ground-state configuration [Xe] 4f10 6s2.
Atomic Number (Z)
66
IUPAC Symbol
Dy
Standard Atomic Weight
162.5 g/mol
Period / Group / Block
6 / f-block / f-block
Condensed Electron Config
[Xe] 4f10 6s2
Full Subshell Config
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f10 5s2 5p6 6s2
Principal Shell Occupancy
[2, 8, 18, 28, 8, 2]
Pauling Electronegativity
1.22
First Ionization Energy
573 kJ/mol
Covalent Radius
192 pm
Melting Point
1680 K (1406.85 °C)
Boiling Point
2840 K (2566.85 °C)
Density
8.55 g/cm³
Oxidation States
+3
Dy (Z=66) — Valence shell highlighted in vermilion