Template:Infobox technetium

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43 molybdenum ← technetium → ruthenium Mn ↑ Tc ↓ Re Periodic Table - Extended Periodic Table
General
Name, Symbol, Number	technetium, Tc, 43
Chemical series	transition metals
Group, Period, Block	7, 5, d
Appearance	silvery gray metal
Standard atomic weight	[98](0)  g·mol−1
Electron configuration	[Kr] 4d5 5s2
Electrons per shell	2, 8, 18, 13, 2
Physical properties
Phase	solid
Density (near r.t.)	11  g·cm−3
Melting point	2430 K (2157 °C, 3915 °F)
Boiling point	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
Crystal structure	hexagonal
Oxidation states	7, 6, 5,[1] 4,[2] 3,[3] 1[4] (strongly acidic oxide)
Electronegativity	1.9 (Pauling scale)
Electron affinity	-53 kJ/mol
Ionization energies	1st: 702 kJ/mol
	2nd: 1470 kJ/mol
	3rd: 2850 kJ/mol
Atomic radius	135  pm
Atomic radius (calc.)	183  pm
Covalent radius	156  pm
Miscellaneous
Magnetic ordering	Paramagnetic
Thermal conductivity	(300 K) 50.6  W·m−1·K−1
CAS registry number	7440-26-8
Selected isotopes
Main article: Isotopes of infobox 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 90 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 trace 6.01 h IT 0.142, 0.002 99Tc γ 0.140 -
References

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