Thulium has an electronic configuration of [Xe] 4f136s2 You could count either 2 or 15. The concept of valence electrons is almost meaningless when applied to the lanthanides. Thulium is a typical member of these and has one common oxidation state, +3
Thulium belongs to the Lanthanide family. Thulium is a silvery metal, so soft it can be cut with a knife. Thulium is stable in air, but reacts slowly with water, and rapidly with acids.
Malleable and ductile enough to be cut with a knife, the chemical element Thulium is a fairly soft metal, appearing on the Mohs scale of mineral hardness at 2 to 3.
natural TM has possible use in ferrites(ceramic,magnetic,and materals) used in microwave eqipament
Thulium is an lanthanide element with atomic number 69.
The symbol for tantalum is Ta.
No.
Thulium, with the chemical symbol Tm, is the chemical element with the atomic number 69.
Thulium--Tm, atomic number 69--is a silvery-white metal.
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69 protons, 69 electrons Thulium-169 isotope has 100 neutrons
168.93