General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles


Name Ytterbium Symbol Yb
atomic number 70 Atomic weight 173.04
Density @ 293 K 6.98 g/cm3 Atomic volume 24.79 cm3/mol
Group Rare Earth, Lanthanides discovered 1879


state (s, l, g) s
melting point 1097.2 K boiling point 1700 K
Heat of fusion 7.660 kJ/mol Heat of vaporization 128.90 kJ/mol
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1st ionization energy 603.4 kJ/mole electronegativity 1.21
2nd ionization energy 1176 kJ/mole electron affinity 50 kJ/mole
3rd ionization energy 2415 kJ/mole Specific heat 0.15 J/gK
heat atomization 152 kJ/mole atoms

Oxidation & Electrons

Shells 2,8,18,32,8,2 electron configuration [Xe] 4f14 6s2
minimum oxidation number 0 maximum oxidation number 3
min. common oxidation no. 0 max. common oxidation no. 3
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Appearance & Characteristics

structure fcc: face-centered cubic color silvery-white
uses alloys toxicity
hardness mohs characteristics soft


reaction with air vigorous, = Yb2O3 reaction with 6M HCl mild, = H2, YbCl3
reaction with 6M HCl mild, = H2, YbCl3 reaction with 15M HNO3 mild, = Yb(NO3)3
reaction with 6M NaOH
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Other Forms

number of isotopes 7 hydride(s) YbH2 Yb2H5
oxide(s) Yb2O3 chloride(s) YbCl2 YbCl3


ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 193 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) 116 pm ionic radius (3+ ion) 100.8 pm
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thermal conductivity 34.9 J/m-sec-deg electrical conductivity 35.7 1/mohm-cm
polarizability 21 A^3


source Monazite(phosphate),bastnaesite rel. abund. solar system -0.606 log
abundance earth's crust 0.5 log cost, pure 530 $/100g
cost, bulk $/100g
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World Wide Web presentation of Chemicool Periodic Table is © Copyright 1996-99 by David D. Hsu. Some data were provided by and used with the permission of JCE Software and is owned and copyright by the Division of Chemical Education, Inc. Additional data were provided by Perkin-Elmer through Peter Lykos of IIT. The information may not be redistributed without the permission of David Hsu or JCE Software.