atomic_number: 90
symbol: Th
name: Thorium
category: Actinide
category_label: Actinide
period: 7
group: null
group_label: Actinide
block: f
grid_row: 10
grid_col: 5
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: true
atomic_mass: '232.038'
atomic_mass_value: 232.038
atomic_mass_most_stable_isotope: false
oxidation_states: '*4*'
oxidation_states_parsed:
- state: '4'
  common: true
ionization_energy: '6.307'
ionization_energy_ev: 6.307
electron_configuration: '[Rn] 6d^{2}7s^{2}'
electron_configuration_formatted: '[Rn]6d²7s²'
electron_configuration_html: '[Rn]6d<sup>2</sup>7s<sup>2</sup>'
atomic_radius: '2.45'
atomic_radius_angstrom: 2.45
electron_affinity: U
electron_affinity_ev: null
rsc_url: https://www.rsc.org/periodic-table/element/90/thorium