atomic_number: 61
symbol: Pm
name: Promethium
category: Lanthanide
category_label: Lanthanide
period: 6
group: null
group_label: Lanthanide
block: f
grid_row: 9
grid_col: 8
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: true
atomic_mass: '[145]'
atomic_mass_value: 145.0
atomic_mass_most_stable_isotope: true
oxidation_states: '*3*'
oxidation_states_parsed:
- state: '3'
  common: true
ionization_energy: '5.582'
ionization_energy_ev: 5.582
electron_configuration: '[Xe] 4f^{5}6s^{2}'
electron_configuration_formatted: '[Xe]4f⁵6s²'
electron_configuration_html: '[Xe]4f<sup>5</sup>6s<sup>2</sup>'
atomic_radius: '2.38'
atomic_radius_angstrom: 2.38
electron_affinity: U
electron_affinity_ev: null
rsc_url: https://www.rsc.org/periodic-table/element/61/promethium