Technetium

molybdenum ← technetium → ruthenium Mn ↑ Tc ↓ Re 43Tc Periodic table
Ìfarahàn
Shiny gray metal
Àwọn ìní àníkárí
Orúkọ, àmì-ìdámọ̀, nọ́mbà	technetium, Tc, 43
Ìpè	/tɛkˈniːʃiəm/ tek-NEE-shee-əm
Ẹ̀ka apilẹ̀sẹ̀	transition metal
Àdìpọ̀, ìgbà, block	7, 5, d
Ìwúwo átọ́mù	98(0) g·mol−1
Ìtòjọ ẹ̀lẹ́ktrónì	Kr 4d5 5s2
Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan	2, 8, 18, 13, 2 (Image)
Àwọn ìní aláfójúrí
Phase	solid
Kíki (tó súnmọ́ r.t.)	11 g·cm−3
ojúàmì ìyọ́	2430 K, 2157 °C, 3915 °F
ajúàmì ìhó	4538 K, 4265 °C, 7709 °F
Heat of fusion	33.29 kJ·mol−1
Heat of vaporization	585.2 kJ·mol−1
Specific heat capacity	(25 °C) 24.27 J·mol−1·K−1
Vapor pressure extrapolated
P/Pa 1 10 100 1 k 10 k 100 k at T/K 2727 2998 3324 3726 4234 4894
Atomic properties
Oxidation states	7, 6, 5, 4, 3, 2, 1, -1, -3 (strongly acidic oxide)
Electronegativity	1.9 (Pauling scale)
Ionization energies	1st: 702 kJ·mol−1
	2nd: 1470 kJ·mol−1
	3rd: 2850 kJ·mol−1
Atomic radius	136 pm
Covalent radius	147±7 pm
Miscellanea
Crystal structure	hexagonal
Magnetic ordering	Paramagnetic
Thermal conductivity	(300 K) 50.6 W·m−1·K−1
Speed of sound (thin rod)	(20 °C) 16,200 m/s
CAS registry number	7440-26-8
Most stable isotopes
Main article: Isotopes of technetium
iso NA half-life DM DE (MeV) DP 95mTc syn 61 d ε - 95Mo γ 0.204, 0.582, 0.835 - IT 0.0389, e 95Tc 96Tc syn 4.3 d ε - 96Mo γ 0.778, 0.849, 0.812 - 97Tc syn 2.6×106 y ε - 97Mo 97mTc syn 91 d IT 0.965, e 97Tc 98Tc syn 4.2×106 y β− 0.4 98Ru γ 0.745, 0.652 - 99Tc trace 2.111×105 y β− 0.294 99Ru 99mTc syn 6.01 h IT 0.142, 0.002 99Tc γ 0.140 -