Thulium

created by Webster 1913

(thing) by SSMark82 (1.8 y) (print) ? (I like it!) Tue Dec 12 2000 at 21:04:15

Thulium
Symbol: Tm
Atomic Number: 69
Atomic Weight: 168.9342
Boiling Point: 2223 K
Melting Point: 1818 K
Density at 300 K: 9.32 g/cm³
Covalent radius: 1.56
Atomic radius: 2.42
Atomic volume: 18.1 cm³/mol
First ionization potental: 6.184 V
Specific heat capacity: 0.16 J g^-1 K^-1
Thermal conductivity: 16.8 W m^-1 K^-1
Electrical conductivity: 1.3*10⁶ Ω^-1 m^-1
Heat of fusion: 16.8 kJ/mol
Heat of vaporization: 191 kJ/mol
Electronegativity: 1.25 (Pauling's)

(definition) by Webster 1913 (print) Wed Dec 22 1999 at 3:48:21

Thu"li*um (?), n. [NL. See Thule.] Chem.

A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite.

Ytterbium	Lanthanide Series	TM	Periodic Table of the Elements
Discovery of the Lanthanides and Actinides	Thorium	Erbium

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