Erbium
Chemical element
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Erbium is a chemical element; it has symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. Wikipedia
Symbol: Er
Atomic number: 68
Atomic mass: 167.259 u
Discoverer: Carl Gustaf Mosander
Discovered: 1843
Melting point: 2,784°F (1,529°C)
Boiling point: 5,194°F (2,868°C)
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