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Tc - Technetium

Technetium was discovered in platinum ore using x-ray technology by Walter Noddack and Ida Tacke in Berlin. The element was artificially produced in 1937 by Emilio Segrè and Carlo Perrier at UC Berkeley.

Atomic number - 43 Density g/mL 11 .5
Atomic weight u 98 Melting point K 2473
Bonding radius A 1 .27 Boiling point K 4538
Atomic radius A 1 .95 Heat of vaporization kJ/mol 660
Ionization Potential V 7 .28 Heat of fusion kJ/mol 24
Electronegativity - 1 .9 Specific heat J/gK 0 .21
The oxide is a strong acid.
Crystal are hexagonal.

Electron config. : [Kr] 4d5 5s2

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113
Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

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