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69 Lanthanide
Tm

Thulium

RIS 0.012
Velocity +0.000
Rank#82
Co-citedHo
Physical properties
Category Lanthanide
Block f-block
State Solid
Config [Xe] 4f13 6s2
Electronegativity 1.25
Density 9.321 g/cm³
Melting 1818.0 K
Boiling 2223.0 K
Ionization 596.7 kJ/mol
Oxidation +2, +3
Discovered 1879 · Per Teodor Cleve
Thulium's history

Research intensity over time

Research communities behind this literature

Groups of papers that cite each other densely, with the share of Thulium's tracked research in each.