Yttrium, 39 Yttrium Pípè / ˈ ɪ t r i ə m / (IT -ree-əm Ìhànsójú silvery white Ìwúwo átọ̀mù A r, std (Y) 88.9058 4(1) Yttrium ní orí tábìlì àyè Nọ́mbà átọ̀mù (Z ) 39 Ẹgbẹ́ group 3 Àyè àyè 5 Àdìpọ̀ Àdìpọ̀-d Ẹ̀ka ẹ́límẹ́ntì Transition metalÌtò ẹ̀lẹ́ktrọ́nù [Kr ] 4d1 5s2 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 9, 2 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 1799 K (1526 °C, 2779 °F) Ígbà ìhó 3609 K (3336 °C, 6037 °F) Kíki (near r.t. ) 4.472 g/cm3 when liquid (at m.p. ) 4.24 g/cm3 Heat of fusion 11.42 kJ/mol Heat of 365 kJ/mol Molar heat capacity 26.53 J/(mol·K) pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1883 2075 (2320) (2627) (3036) (3607)
Atomic properties Oxidation states 0, +1, +2, +3 Electronegativity Pauling scale: 1.22 Atomic radius empirical: 180 pm Covalent radius 190±7 pm Color lines in a spectral range Spectral lines of yttrium Other properties Natural occurrence primordial Crystal structure hexagonal Speed of sound thin rod 3300 m/s (at 20 °C) Thermal expansion (r.t.) (α, poly) Thermal conductivity 17.2 W/(m·K) Electrical resistivity (r.t.) (α, poly) 596 n Ω·m Magnetic ordering paramagnetic Young's modulus 63.5 GPa Shear modulus 25.6 GPa Bulk modulus 41.2 GPa Poisson ratio 0.243 Brinell hardness 589 MPa CAS Number 7440-65-5 Main isotopes of yttrium Isotope Abundance Half-life (t 1/2 ) Decay mode Product 87 Y syn 3.35 d ε - 87 Sr γ 0.48, 0.38D 88 Y syn 106.6 d ε - 88 Sr γ 1.83, 0.89 89 Y 100% 89 Y is stable with 50 neutrons 90 Y syn 2.67 d β− 2.28 90 Zr γ 2.18 91 Y syn 58.5 d β− 1.54 91 Zr γ 1.20
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