atomic_number: 55
symbol: Cs
name: Caesium
category: AlkaliMetal
category_label: Alkali Metal
period: 6
group: 1
group_label: 1 IA
block: s
grid_row: 6
grid_col: 1
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: false
atomic_mass: '132.905'
atomic_mass_value: 132.905
atomic_mass_most_stable_isotope: false
oxidation_states: '*1*'
oxidation_states_parsed:
- state: '1'
  common: true
ionization_energy: '3.894'
ionization_energy_ev: 3.894
electron_configuration: '[Xe] 6s^{1}'
electron_configuration_formatted: '[Xe]6s¹'
electron_configuration_html: '[Xe]6s<sup>1</sup>'
atomic_radius: '3.43'
atomic_radius_angstrom: 3.43
electron_affinity: '0.4716'
electron_affinity_ev: 0.4716
rsc_url: https://www.rsc.org/periodic-table/element/55/caesium