Tellurium, 52 Te Tellurium Pípè / t ᵻ ˈ lj ʊər i ə m / (tə-LEWR -ee-əm ) Ìhànsójú silvery lustrous gray Ìwúwo átọ̀mù A r, std (Te) 127.60(3) [ 1] Tellurium ní orí tábìlì àyè
Nọ́mbà átọ̀mù (Z ) 52 Ẹgbẹ́ group 16 (chalcogens) Àyè àyè 5 Àdìpọ̀ Àdìpọ̀-p Ẹ̀ka ẹ́límẹ́ntì Metalloid Ìtò ẹ̀lẹ́ktrọ́nù [Kr ] 4d10 5s2 5p4 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 18, 6 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 722.66 K (449.51 °C, 841.12 °F) Ígbà ìhó 1261 K (988 °C, 1810 °F) Kíki (near r.t. ) 6.24 g/cm3 when liquid (at m.p. ) 5.70 g/cm3 Heat of fusion 17.49 kJ/mol Heat of 114.1 kJ/mol Molar heat capacity 25.73 J/(mol·K) pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
(775)
(888)
1042
1266
Atomic properties Oxidation states −2 , −1, +1, +2 , +3, +4 , +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: 2.1 Atomic radius empirical: 140 pm Covalent radius 138±4 pm Van der Waals radius 206 pm Color lines in a spectral range Spectral lines of telluriumOther properties Natural occurrence primordial Crystal structure hexagonal Speed of sound thin rod 2610 m/s (at 20 °C) Thermal conductivity (1.97–3.38) W/(m·K) Magnetic ordering diamagnetic [ 2] Young's modulus 43 GPa Shear modulus 16 GPa Bulk modulus 65 GPa Mohs hardness 2.25 Brinell hardness 180 MPa CAS Number 13494-80-9 Main isotopes of tellurium
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References
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↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi :10.1515/pac-2015-0305 .
↑ Magnetic susceptibility of the elements and inorganic compounds , in Handbook of Chemistry and Physics 81th edition, CRC press.