Rhodium, 45 Rh Rhodium Pípè / ˈ r oʊ d i ə m / (ROH -dee-əm ) Ìhànsójú silvery white metallic Ìwúwo átọ̀mù A r, std (Rh) 102.9054 9(2) Rhodium ní orí tábìlì àyè Nọ́mbà átọ̀mù (Z ) 45 Ẹgbẹ́ group 9 Àyè àyè 5 Àdìpọ̀ Àdìpọ̀-d Ẹ̀ka ẹ́límẹ́ntì Transition metalÌtò ẹ̀lẹ́ktrọ́nù [Kr ] 4d8 5s1 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 16, 1 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 2237 K (1964 °C, 3567 °F) Ígbà ìhó 3968 K (3695 °C, 6683 °F) Kíki (near r.t. ) 12.41 g/cm3 when liquid (at m.p. ) 10.7 g/cm3 Heat of fusion 26.59 kJ/mol Heat of 494 kJ/mol Molar heat capacity 24.98 J/(mol·K) pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 2288 2496 2749 3063 3405 3997
Atomic properties Oxidation states −3, −1, 0, +1, +2, +3 , +4, +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: 2.28 Atomic radius empirical: 134 pm Covalent radius 142±7 pm Color lines in a spectral range Spectral lines of rhodium Other properties Natural occurrence primordial Crystal structure (fcc) Speed of sound thin rod 4700 m/s (at 20 °C) Thermal expansion 8.2 µm/(m·K) (at 25 °C) Thermal conductivity 150 W/(m·K) Electrical resistivity 43.3 n Ω·m (at 0 °C) Magnetic ordering paramagnetic Young's modulus 380 GPa Shear modulus 150 GPa Bulk modulus 275 GPa Poisson ratio 0.26 Mohs hardness 6.0 Vickers hardness 1246 MPa Brinell hardness 1100 MPa CAS Number 7440-16-6 Main isotopes of rhodium Isotope Abundance Half-life (t 1/2 ) Decay mode Product 99 Rh syn 16.1 d ε - 99 Ru γ 0.089, 0.353, 0.528 - 101m Rh syn 4.34 d ε - 101 Ru IT 0.157 101 Rh γ 0.306, 0.545 - 101 Rh syn 3.3 y ε - 101 Ru γ 0.127, 0.198, 0.325 - 102m Rh syn 2.9 y ε - 102 Ru γ 0.475, 0.631, 0.697, 1.046 - 102 Rh syn 207 d ε - 102 Ru β+ 0.826, 1.301 102 Ru β− 1.151 102 Pd γ 0.475, 0.628 - 103 Rh 100% 103 Rh is stable with 58 neutrons 105 Rh syn 35.36 h β− 0.247, 0.260, 0.566 105 Pd γ 0.306, 0.318 -
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