Technetium Element Properties

Technetium

d42
Mo
Molybdenum
d43
Tc
Technetium
d44
Ru
Ruthenium
General
Name(Technetium)
Symbol(Tc)
Number(43)
Group Number(7)
Group(Transition metals)
Block(d)
Density(11.5 g/cm3)
Atomic Weight(98.9062 g/mol)
Atomic Volume(8.5 cm3/mol)
Discover(1939)


States
State(Solid)
Melting Point(2430 K)
Boiling Point(4538 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(33.29 kJ/mol)
Heat of Vaporization(585.2 kJ/mol)


Energies
First Ionization Energy(702.4 kJ/mole)
Second Ionization Energy(1472.4 kJ/mole)
Third Ionization Energy(2850.2 kJ/mole)
Electronegativity(1.9)
Electron Affinity(53 kJ/mole)
Specific Heat(0.21 J/gK)
Heat Atomization(677 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,14,1)
Electron Configuration([Kr] 4d5 5s2)
Minimum Oxidation Number(-3)
Maximum Oxidation Number(7)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(7)


Appearance and Characteristics
Crystal Structure(hexagonal)
Characteristics(Radioactive, man made)
Color(silvery gray)
Uses(medical imaging agents)
Hardness(mohs)
Toxicity(None)


Reactions
Reaction with Air(mild, w/ht, =>Tc2O7)
Reaction with 6M HCl(None)
Reaction with 15M HNO3(mild, =>HTcO4)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(0)
Hydride(None)
Oxide(TcO2 Tc2O7)
Chloride(TcCl4)


Radius
Atomic Radius(136 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(Nil)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(Nil)


Conductivity
Thermal Conductivity(50.6 J/m-sec-deg)
Electrical Conductivity(Nil)
Polarizability(11.4 A3)


Abundance
Source(Synthetic (U fission))
Relation Abundance Solar System(Nil)
Abundance Earths Crust(Nil)


d42
Mo
Molybdenum
d43
Tc
Technetium
d44
Ru
Ruthenium

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