Ytterbium, 70 Yb Ytterbium Pípè / ɪ ˈ t ɜːr b i ə m / (i-TUR -bee-əm ) Ìhànsójú silvery white Ìwúwo átọ̀mù A r, std (Yb) 173.045(10) Ytterbium ní orí tábìlì àyè Nọ́mbà átọ̀mù (Z ) 70 Ẹgbẹ́ group n/a Àyè àyè 6 Àdìpọ̀ Àdìpọ̀-f Ẹ̀ka ẹ́límẹ́ntì LanthanideÌtò ẹ̀lẹ́ktrọ́nù [Xe ] 4f14 6s2 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 32, 8, 2 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 1097 K (824 °C, 1515 °F) Ígbà ìhó 1469 K (1196 °C, 2185 °F) Kíki (near r.t. ) 6.90 g/cm3 when liquid (at m.p. ) 6.21 g/cm3 Heat of fusion 7.66 kJ/mol Heat of 159 kJ/mol Molar heat capacity 26.74 J/(mol·K) pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 736 813 910 1047 (1266) (1465)
Atomic properties Oxidation states +1, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: ? 1.1 Atomic radius empirical: 176 pm Covalent radius 187±8 pm Color lines in a spectral range Spectral lines of ytterbium Other properties Natural occurrence primordial Crystal structure (fcc) Speed of sound thin rod 1590 m/s (at 20 °C) Thermal expansion (r.t.) (β, poly) 26.3 µm/(m·K) Thermal conductivity 38.5 W/(m·K) Electrical resistivity (r.t.) (β, poly) 0.250 µ Ω·m Magnetic ordering paramagnetic Young's modulus (β form) 23.9 GPa Shear modulus (β form) 9.9 GPa Bulk modulus (β form) 30.5 GPa Poisson ratio (β form) 0.207 Vickers hardness 206 MPa Brinell hardness 343 MPa CAS Number 7440-64-4 Main isotopes of ytterbium Isotope Abundance Half-life (t 1/2 ) Decay mode Product 166 Yb syn 56.7 h ε 0.304 166 Tm 168 Yb 0.13% 168 Yb is stable with 98 neutrons 169 Yb syn 32.026 d ε 0.909 169 Tm 170 Yb 3.04% 170 Yb is stable with 100 neutrons 171 Yb 14.28% 171 Yb is stable with 101 neutrons 172 Yb 21.83% 172 Yb is stable with 102 neutrons 173 Yb 16.13% 173 Yb is stable with 103 neutrons 174 Yb 31.83% 174 Yb is stable with 104 neutrons 175 Yb syn 4.185 d β− 0.470 175 Lu 176 Yb 12.76% 176 Yb is stable with 106 neutrons 177 Yb syn 1.911 h β− 1.399 177 Lu
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