thulium

thulium (chemical element)

Periodic table location

Image

atomic symbol | Tm atomic number | 69 short electronic configuration | [Xe]6s^24f^13 Aufbau diagram | 4f 6s block | f period | 6 atomic mass | 168.93422 u (unified atomic mass units)

phase at STP | solid melting point | 1545 °C (rank: 24th) boiling point | 1950 °C (rank: 55th) molar heat of fusion | 16.8 kJ/mol (rank: 28th) molar heat of vaporization | 250 kJ/mol (rank: 51st) specific heat at STP | 160 J/(kg K) (rank: 66th) Néel point | 56 K (properties at standard conditions)

density | 9.321 g/cm^3 (rank: 30th) liquid density | 8.56 g/cm^3 molar volume | 18.12 cm^3/mol Mohs hardness | 1.8 (between gypsum and talc) Vickers hardness | 520 MPa (rank: 30th) Brinell hardness | 471 MPa (rank: 33rd) bulk modulus | 45 GPa (rank: 34th) shear modulus | 31 GPa Young's modulus | 74 GPa (rank: 27th) Poisson ratio | 0.21 (rank: 49th) tensile yield strength | 60 MPa (rank: 22nd) ultimate tensile strength | 140 MPa (rank: 19th) thermal expansion | 1.33×10^-5 K^(-1) (rank: 25th) thermal conductivity | 17 W/(m K) (rank: 53rd) (properties at standard conditions)

electrical type | conductor resistivity | 7×10^-7 Ω m (ohm meters) electrical conductivity | 1.4×10^6 S/m (siemens per meter) magnetic type | paramagnetic volume magnetic susceptibility | 0.0185488 mass magnetic susceptibility | 1.99×10^-6 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 3.36179×10^-7 m^3/mol (cubic meters per mole) Curie point | 25 K (kelvins) Néel point | 56 K (kelvins) color | (silver)

valence | 3 electronegativity | 1.25 electron affinity | 50 kJ/mol (kilojoules per mole) first ionization energy | 596.7 kJ/mol (kilojoules per mole) ionization energies | 596.7 kJ/mol | 1160 kJ/mol | 2285 kJ/mol | 4120 kJ/mol

Reactivity

term symbol | ^2F_(7/2) atomic radius | 175 pm covalent radius | 190 pm (electronic ground state properties)

(neutral thulium atomic spectrum)

universe abundance | 1×10^-8 mass% (rank: 81st) solar abundance | 2×10^-8 mass% (rank: 70th) meteorite abundance | 2.9×10^-6 mass% (rank: 74th) crust abundance | 4.5×10^-5 mass% (rank: 63rd) ocean abundance | 2×10^-11 mass% (rank: 72nd) universe molar abundance | 1×10^-10 mol% (rank: 78th) solar molar abundance | 9.9×10^-11 mol% (rank: 73rd) meteorite molar abundance | 3×10^-7 mol% (rank: 74th) ocean molar abundance | 7×10^-6 mol% (rank: 18th) crust molar abundance | 5×10^-6 mol% (rank: 64th)

half-life | (stable) stable isotopes | Tm-169 (100%) nuclear spin | Tm-145: 11/2^- | Tm-146: 5^- | Tm-147: 11/2^- | Tm-148: 10^+ | Tm-149: 11/2^- | Tm-150: 6^- | Tm-151: 11/2^- | Tm-152: 2^- | Tm-153: 11/2^- | Tm-154: 2^- | Tm-155: 11/2^- | Tm-156: 2^- | Tm-157: 1/2^+ | Tm-158: 2^- | Tm-159: 5/2^+ | Tm-160: 1^- | Tm-161: 7/2^+ | Tm-162: 1^- | Tm-163: 1/2^+ | Tm-164: 1^+ | Tm-165: 1/2^+ | Tm-166: 2^+ | Tm-167: 1/2^+ | Tm-168: 3^+ | Tm-169: 1/2^+ | Tm-170: 1^- | Tm-171: 1/2^+ | Tm-172: 2^- | Tm-173: 1/2^+ | Tm-174: 4^- | Tm-175: 1/2^+ | Tm-176: 4^+ | Tm-177: 7/2^- | Tm-179: 1/2^+ unstable isotopes | Tm-171 (1.92 yr) | Tm-170 (128.6 days) | Tm-168 (93.1 days) | Tm-167 (9.25 days) | Tm-172 (63.6 h) | Tm-165 (30.06 h) | Tm-173 (8.25 h) | Tm-166 (7.8 h) | Tm-163 (108.6 min) | Tm-161 (30.17 min) | Tm-162 (22 min) | Tm-175 (15.2 min) | Tm-160 (9.33 min) | Tm-159 (9.13 min) | Tm-174 (5.33 min) | Tm-158 (3.98 min) | Tm-157 (218 s) | Tm-164 (120 s) | Tm-176 (110 s) | Tm-177 (90 s) | Tm-156 (83.8 s) | Tm-178 (30 s) | Tm-155 (21.6 s) | Tm-179 (20 s) | Tm-154 (8.1 s) | Tm-152 (8 s) | Tm-151 (4.17 s) | Tm-150 (2.2 s) | Tm-153 (1.48 s) | Tm-149 (900 ms) | Tm-148 (700 ms) | Tm-147 (580 ms) | Tm-146 (80 ms) | Tm-145 (3.17 µs) neutron cross-section | 105 b neutron mass absorption | 0.025 m^2/kg

CAS number | 7440-30-4 PubChem CID number | 23961