atomic_number: 69
symbol: Tm
name: Thulium
category: Lanthanide
category_label: Lanthanide
period: 6
group: null
group_label: Lanthanide
block: f
grid_row: 9
grid_col: 16
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: false
atomic_mass: '168.934'
atomic_mass_value: 168.934
atomic_mass_most_stable_isotope: false
oxidation_states: '*3* 2'
oxidation_states_parsed:
- state: '3'
  common: true
- state: '2'
  common: false
ionization_energy: '6.184'
ionization_energy_ev: 6.184
electron_configuration: '[Xe] 4f^{13}6s^{2}'
electron_configuration_formatted: '[Xe]4f¹³6s²'
electron_configuration_html: '[Xe]4f<sup>13</sup>6s<sup>2</sup>'
atomic_radius: '2.27'
atomic_radius_angstrom: 2.27
electron_affinity: '1.029'
electron_affinity_ev: 1.029
rsc_url: https://www.rsc.org/periodic-table/element/69/thulium