Holmium Facts - Element Atomic Number 67

Holmium Facts - Element Atomic Number 67 Holmium is atomic number 67 with element symbol Ho. It is a rare earth metal belonging to the lanthanide series. HolmiumBasic Facts Atomic Number: 67 Symbol: Ho Atomic Weight: 164.93032 Discovery: Delafontaine 1878 or J.L. Soret 1878 (Switzerland) Electron Configuration: [Xe] 4f11 6s2 Element Classification: Rare Earth (Lanthanide) Word Origin: Holmia, the Latinized name for Stockholm, Sweden. Holmium Physical Data Density (g/cc): 8.795 Melting Point (K): 1747 Boiling Point (K): 2968 Appearance: relatively soft, malleable, lustrous, silvery metal Atomic Radius (pm): 179 Atomic Volume (cc/mol): 18.7 Covalent Radius (pm): 158 Ionic Radius: 89.4 (3e) Specific Heat (20Â °C J/g mol): 0.164 Evaporation Heat (kJ/mol): 301 Pauling Negativity Number: 1.23 First Ionizing Energy (kJ/mol): 574 Oxidation States: 3 Lattice Structure: Hexagonal Lattice Constant (Ã…): 3.580 Lattice C/A Ratio: 1.570 References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Langes Handbook of Chemistry (1952), CRC Handbook of Chemistry Physics (18th Ed.) What is an element? Return to the Periodic Table