Some predicted properties of elements 113 and 114

Some predicted properties of elements 113 and 114

Table
Some predicted properties of elements 113 and 114
element 113 element 114
(eka-thallium) (eka-lead)
chemical group 13 14
atomic weight 297 298
most stable oxidation state +1 +2
oxidation potential, V –0.6 –0.8
M → M+ + e M → M2+ + 2e
metallic radius, Å 1.75 1.85
ionic radius, Å 1.48 1.31
first ionization potential, eV 7.4 8.5
second ionization potential, eV . . . 16.8
density, g/cm3 16 14
atomic volume, cm2/mole 18 21
boiling point, °C 1,100 150
melting point, °C 430 70
heat of sublimation, kcal/mole 34 10
heat of vaporization, kcal/mole 31 9
debye temperature, °K 70 46
entropy, entropy unit/mole (25 °C) 17 20
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