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Name Ytterbium
Symbol Yb
Atomic number 70
Atomic mass 173.04 amu
Normal state Solid
Classification Metallic
Crystal structure Cubic face centered
Color silvery, oxidises slowly in air and reacts with water
Date of discovery 1878
Name of discoverer Jean Charles Galissard de Marignac
Name origin Named for Ytterby, Sweden
Uses Used in metallurgical and chemical experiments and sometimes used in stress gauges.
Obtained from Found in minerals such as yttria, monazite, gadolinite, and xenotime.

Ytterbium is a soft metallic element. It belongs to the rare earth group.[1]