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promethium
Image: Wikimedia Commons

promethium

Chemical element with symbol Pm and atomic number 61

Chemical elementchemical elementsynthetic elementQ1809

Also known as ₆₁Pm · Pm · element 61

Symbol
Atomic number
Mass
Melting point
  • 1,353 K
Boiling point
  • 3,273 K
Density
  • 7,200 kg/m³
Discovered by
Discovered

Overview

All data

101 statements · 29% with external sources · numbers in brackets are citations

Named after
Oxidation state
  • 3
  • 2
Location of discovery
Canonical SMILES
Formula
Has characteristic
Unicode character
Electronegativity
  • 1.13
Part of
Follows
Ionic radius
  • 0.97 ångström charge number: 3 · coordination number: 6
  • 1.09 ångström charge number: 3 · coordination number: 8
Thermal conductivity
  • 15 watt per metre kelvin
Electrical conductivity
  • 1,330,000 siemens per metre
Crystal system
Subclass of
Ionization energy
Electron configuration
IPA transcription
Atomic radius
  • 185 picometre
Covalent radius
  • 199 picometre

On other databases

51 identifiers linking promethium across the web's reference databases