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Astronomy Chemical element

Europium

Europium (Eu) is a chemical element of the lanthanide series (inner-transition metal) with atomic number 63 and standard atomic mass 151.964 u. This sheet describes its fundamental properties, periodic position and physical characteristics.

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Astronomy · Chemical element

Europium

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Identity

  • Name: Europium
  • Symbol: Eu
  • Atomic number: 63
  • Atomic mass: 151.964 u

Position in the periodic table

  • Group / Series: Lanthanides (f-block) / often placed in Group 3
  • Period: 6
  • Category: Inner-transition metal (lanthanide)

Physico-chemical properties

  • Standard state: Solid
  • Melting point: ~ 822 °C (≈ 1095 K) :contentReference[oaicite:2]{index=2}
  • Density: ~ 5.24 g/cm³ :contentReference[oaicite:3]{index=3}
  • Electron configuration: [Xe] 4f⁷ 6s² :contentReference[oaicite:4]{index=4}

Scientific description

Europium is a chemical element with symbol Eu and atomic number 63. It belongs to the lanthanide series (inner-transition metals) and occupies period 6 of the periodic table. Its standard atomic mass is approximately 151.964 u. It is one of the rare-earth elements, with important applications in phosphors and nuclear technology. :contentReference[oaicite:5]{index=5}