Periodic Table of the Elements
Periodic Table




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name Thulium
latin Thulium
french Thulium
german Thulium
symbol Tm
proton number 69
atomic weight 168.93421
Pauling electronegativity 1.25
electronic configuration [Xe] 4f135d06s2
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melting point 1818 K, 1545°C, 2813°F
boiling point 2223 K, 1950°C, 3542°F
group -
period 6
state (by 20°C) solid
oxidation states +3
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Year of discovery Discoverer
1879 Per T. Cleve

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