71Lu174.9667
Lutetium
Lanthanide
Solid at STP
Period 6Block FDiscovered 1907
[Xe]6s2 4f14 5d1
Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry, but not in moist air. It is considered the first element of the 6th-period transition metals and the last element in the lanthanide series, and is traditionally counted among the rare earths.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 71 |
| Atomic Mass | 174.9667 u |
| Electron Configuration | [Xe]6s2 4f14 5d1 |
| Oxidation States | +3 |
| Electronegativity | 1.27 (Pauling) |
| Atomic Radius | 221 pm |
| Ionization Energy | 5.426 eV |
| Block | F |
Physical Properties
| Appearance | silvery white |
| Standard State | Solid |
| Melting Point | 1936 K (1662.8 °C) |
| Boiling Point | 3675 K (3401.8 °C) |
| Density | 9.84 g/cm³ |
| Molar Heat | 26.86 J/(mol·K) |
| CPK Color | #00AB24 |
Classification
| Category | Lanthanide |
| Group Block | Lanthanide |
| Period | 6 |
| Block | F |
Discovery
| Year Discovered | 1907 |
| Discovered By | Georges Urbain |
| Electron Shells | 2, 8, 18, 32, 9, 2 |