Yttrium (Y)

Yttrium is a chemical element with symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare-earth element".

Atomic Number

39

Atomic Mass

88.906 u

Category

transition metal

Phase

solid

Density

4.47 g/cm³

Electron Shells

2, 8, 18, 9, 2

Atomic Structure

Protons: 39 • Electrons: 39 • Neutrons: Varies by isotope

Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹

Discovery

1794 • Johan Gadolin