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Ytterbium
SEE PERIODIC TABLE
SEE FULL ARTICLE
Atomic Number
70
Atomic
Symbol
Yb
Atomic Weight
173.04 amu
Group
Rare Earth (Lanthanide Series)
Form
Solid
Density
@
STP
6.9 g/cm
3
Melting Point
819 °C (1506.2 °F, 1092.15 °K)
Boiling Point
1196 °C (2184.8 °F, 1469.15 °K)
Heat of Fusion
7.66 kJ/mol
Heat of Vaporization
160 kJ/mol
First
Ionization Potential
6.25416 eV
Specific Heat
Capacity
0.155 J/g K
Ground State
Electron Configuration
4f
14
5s
2
5p
6
6s
2
Oxidation State(s)
+2, +3
Stable Isotopes
and
Natural Abundance
on Earth
168
Yb, 0.13%;
170
Yb, 3.05%;
171
Yb, 14.3%;
172
Yb, 21.9%;
173
Yb, 16.12%;
174
Yb, 31.8%;
176
Yb, 12.7%
Selected
Radioisotopes
169
Yb
Atomic Radius
222 pm
Crystal Structure
Cubic
Discovered by
Galissard de Marignac, 1878
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