Erbium (Er) Properties and Facts

Element 68 - Lanthanide

What are the basic properties of Erbium?

Erbium (symbol: Er) is a lanthanide with atomic number 68. Its atomic mass is 167.26 u, and it belongs to period 6 and group 3.

What is the electron configuration of Erbium?

The electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹² 5s² 5p⁶ 6s²

What are the physical properties of Erbium?

Melting point: 1802.0 K
Boiling point: 3141.0 K
Density: 9.07 g/cm³

What are the known isotopes of Erbium?

  • Er-162: 0.14% abundance
  • Er-164: 1.61% abundance
  • Er-166: 33.61% abundance
  • Er-167: 22.93% abundance
  • Er-168: 26.78% abundance
  • Er-170: 14.93% abundance

What is the biological role and occurrence of Erbium?

Biological role: No known biological role
Natural occurrence: Found in rare earth minerals

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