atomic_number: 53
symbol: I
name: Iodine
category: Halogen
category_label: Halogen
period: 5
group: 17
group_label: 17 VIIA
block: p
grid_row: 5
grid_col: 17
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: false
atomic_mass: '126.904'
atomic_mass_value: 126.904
atomic_mass_most_stable_isotope: false
oxidation_states: 7 5 1 *-1*
oxidation_states_parsed:
- state: '7'
  common: false
- state: '5'
  common: false
- state: '1'
  common: false
- state: '-1'
  common: true
ionization_energy: '10.45'
ionization_energy_ev: 10.45
electron_configuration: '[Kr] 4d^{10}5s^{2}5p^{5}'
electron_configuration_formatted: '[Kr]4d¹⁰5s²5p⁵'
electron_configuration_html: '[Kr]4d<sup>10</sup>5s<sup>2</sup>5p<sup>5</sup>'
atomic_radius: '1.98'
atomic_radius_angstrom: 1.98
electron_affinity: '3.059'
electron_affinity_ev: 3.059
rsc_url: https://www.rsc.org/periodic-table/element/53/iodine