Yttrium

Document v1 · published by Koskamo · updated 2026-10-04

Yttrium (Y) is chemical element 39, a transition metal in group 3, period 5 (PubChem).

Atomic number: 39
Symbol: Y
Group: 3
Period: 5
Atomic mass: 88.90584 u
Electron configuration: [Kr]5s2 4d1
Electronegativity (Pauling scale): 1.22
Atomic radius (van der Waals): 219 pm
Ionization energy: 6.217 eV
Electron affinity: 0.307 eV
Oxidation states: +3
Standard state: Solid
Melting point: 1795 K
Boiling point: 3618 K
Density: 4.47 g/cm³
Chemical group: Transition metal
Year discovered: 1794

Source and provenance

Original source: pubchem.ncbi.nlm.nih.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: PubChem periodic table data (NIH/NLM, pubchem.ncbi.nlm.nih.gov/ptable); group and period from Jefferson Lab via PubChem

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Version history

Published by Koskamo2026-10-04
Version 1