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Technetium, 43 Fáìlì:Tc,43.jpg Technetium Pípè / t ɛ k ˈ n iː ʃ i əm / (tek-NEE -shee-əm Ìhànsójú Shiny gray metal nọ́mbà ìsújọ [97] Technetium ní orí tábìlì àyè
Nọ́mbà átọ̀mù (Z ) 43 Ẹgbẹ́ group 7 Àyè àyè 5 Àdìpọ̀ Àdìpọ̀-d Ẹ̀ka ẹ́límẹ́ntì Transition metal Ìtò ẹ̀lẹ́ktrọ́nù [Kr ] 4d5 5s2 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 13, 2 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 2430 K (2157 °C, 3915 °F) Ígbà ìhó 4538 K (4265 °C, 7709 °F) Kíki (near r.t. ) 11 g/cm3 Heat of fusion 33.29 kJ/mol Heat of 585.2 kJ/mol Molar heat capacity 24.27 J/(mol·K) pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
2727
2998
3324
3726
4234
4894
Atomic properties Oxidation states −3, −1, 0, +1,[ 1] [ 1] +4 +7 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: 1.9 Atomic radius empirical: 136 pm Covalent radius 147±7 pm Color lines in a spectral range Spectral lines of technetiumOther properties Natural occurrence from decay Crystal structure hexagonal Speed of sound thin rod 16,200 m/s (at 20 °C) Thermal conductivity 50.6 W/(m·K) Magnetic ordering Paramagnetic CAS Number 7440-26-8 Main isotopes of technetium
Àdàkọ:Category-inline references
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