Rhodium

Latin nameRhodium
English nameRhodium
chemical symbolRh
atomic number45
relative atomic mass102,9055
period5
groupVIII.B
classificationtransition metals
discovery year1803
discovererW. H. Wollaston
melting point [°C]1966
boiling point [°C]˜3900
density [g cm-3]12,42
density at melting point [g cm-3]10,7
electronegativity [Pauling]2,28
stand. el. potential [V]+0,76
oxidation statesI ˜ V
electron configuration[Kr]4d8 5s1
atomic radius [pm]173
covalent radius [pm]135
specific heat [J g-1K-1]0,24
heat of fusion [kJ mol-1]21,5
thermal conductivity [W m-1 K-1]150
el. conductivity [S m-1]2,3.107
1. ionizing potential [eV]7,4589
2. ionizing potential [eV]18,08
3. ionizing potential [eV]31,06
Mohs hardness6
Vickers hardness [MPa]1246
Brinell hardness [MPa]1100
shear modulus [GPa]150
Young's modulus [GPa]275
state at normal conditionssolid

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