69 Tm 168.93

Thulium

Category: Lanthanide | State: Solid

Atomic Properties

Atomic Number 69
Atomic Mass 168.93
Electronic Configuration [Xe] 4f¹³ 6s²

Periodic Table Placement

Group N/A
Period 6
Block f-block

Physical Properties & Discovery

Melting Point 1545°C
Boiling Point 1950°C
Density 9.321 g/cm³
Discovered By Per Teodor Cleve (1879)

Frequently Asked Questions about Thulium