Ytterbium (Yb)

Ytterbium is a chemical element with symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide series.

Atomic Number

70

Atomic Mass

173.05 u

Category

lanthanide

Phase

solid

Density

6.9 g/cm³

Electron Shells

2, 8, 18, 32, 8, 2

Atomic Structure

Protons: 70 • Electrons: 70 • Neutrons: Varies by isotope

Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴

Discovery

1878 • Jean Charles Galissard de Marignac