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Information valid for Yb-173 unless otherwise noted

Basic Information

Symbol: Yb
Atomic Number: 70
Mass: 173.04
Melting Point: 824.0 C
Boiling Point: 1466.0 C
Number of Protons/Electrons: 70
Number of Neutrons: 103
Classification: Rare Earth
Crystal Structure: Cubic
Density @ 293 K: 6.98 g/cm3
Color: Silvery

Atomic Structure

[Bohr Model of Ytterbium]
Number of Energy Levels: 6

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 8
    Sixth Energy Level: 2


Isotope Half Life
Yb-168 Stable
Yb-169 32.03 days
Yb-170 Stable
Yb-171 Stable
Yb-172 Stable
Yb-173 Stable
Yb-174 Stable
Yb-175 4.19 days
Yb-176 Stable


Date of Discovery: 1878
Discoverer: Jena de Marignac
Name Origin: Ytterby (a town in Sweden)
Uses: metallurgical and chemical experiments
Obtained From: yttria, monazite, gadolinite, xenotime