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thulium
Atomic number:
69
Atomic weight:
168.93421
Symbol:
Tm
Group number:
(lanthanide)
Electronic configuration:
[Xe].4f13.6s2
Physical data
Standard state:
solid at 298 K
Colour:
silvery white
Density of solid at ambient temperature/kg m-3:
9321
Molar volume/cm3:
19.1
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