atomic_number: 87
symbol: Fr
name: Francium
category: AlkaliMetal
category_label: Alkali Metal
period: 7
group: 1
group_label: 1 IA
block: s
grid_row: 7
grid_col: 1
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: true
atomic_mass: '[223]'
atomic_mass_value: 223.0
atomic_mass_most_stable_isotope: true
oxidation_states: '*1*'
oxidation_states_parsed:
- state: '1'
  common: true
ionization_energy: '4.073'
ionization_energy_ev: 4.073
electron_configuration: '[Rn] 7s^{1}'
electron_configuration_formatted: '[Rn]7s¹'
electron_configuration_html: '[Rn]7s<sup>1</sup>'
atomic_radius: '3.48'
atomic_radius_angstrom: 3.48
electron_affinity: '0.46'
electron_affinity_ev: 0.46
rsc_url: https://www.rsc.org/periodic-table/element/87/francium