Yttrium

Atomic symbol: Y
Atomic number: 39
Atomic mass: 88.91

Appearance: Silvery-metallic solid at 25°C

Group: 3
Period: 5
Series: Transition metals
Block: d
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹ 5s²

The first rare earth metal to be discovered.

Yttrium compounds tend to be colorless.

Fun Fact! Yttrium appears to be very common on the moon: lunar rock and dust samples show a high yttrium content.