Chemicool

Yb

70

173.04
Ytterbium
General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles

General

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

States

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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Energies

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

Reactions

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

Radius

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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Conductivity

thermal conductivity 34.9 J/m-sec-deg electrical conductivity 35.7 1/mohm-cm
polarizability 21 A^3

Abundance

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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