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Element 70 - Ytterbium (Yb) sound

From Ytterby, Sweden; discovered 1907. This element is still little ore than a laboratory curiosity. Along with the other rare earths, it turned up in the former U.S.S.R. in a mineral called gagarinite after the first astronaut. It is easily oxidized

Properties

Atomic Number: 70
Atomic Weight: 173.04
Electron Configuration (at ground state): 1s22s22p63s23p63d104s24p64d104f145s25p66s2
Oxidation States (Bold most stable): +3, +2
Boiling Point (K): 1469
Melting Point (K): 1092
Density (at 300K -- g/cm3): 6.97
Atomic Volume (at 300K -- cm3/mol) 24.8
Number of stable isotopes: 7
Mass Number (Bold naturally occurring) -- Half-Life -- Disintigration Type: 169 -- 32.0 days -- orbital electron capture
175 -- 4.19 days -- beta particle (electron) emission
Covalent Radius (Å): 1.70
Atomic Radius (Å): 1.94
First Ionization Potential (V): 6.254
Electronegativity (Pauling's): 1.1
Specific Heat Capacity (at 300K -- J g-1 K-1): 0.155
Heat of Vaporization (kJ/mol): 128
Heat of Fusion (kJ/mol): 7.7
Electrical Conductivity (at 293K for polycrystalline material -- 106 (ohms)-1 cm-1): 3.7
Thermal Conductivity (at 300K -- W m-1 K-1): 34.9
Crystal Structure: Cubic, face centered
Acid-Base Properties: Slightly basic