atomic_number: 17
symbol: Cl
name: Chlorine
category: Halogen
category_label: Halogen
period: 3
group: 17
group_label: 17 VIIA
block: p
grid_row: 3
grid_col: 17
phase: gas
lab_made: false
radioactive_marker: false
is_radioactive: false
atomic_mass: '35.45'
atomic_mass_value: 35.45
atomic_mass_most_stable_isotope: false
oxidation_states: 7 5 3 1 *-1*
oxidation_states_parsed:
- state: '7'
  common: false
- state: '5'
  common: false
- state: '3'
  common: false
- state: '1'
  common: false
- state: '-1'
  common: true
ionization_energy: '12.97'
ionization_energy_ev: 12.97
electron_configuration: '[Ne] 3s^{2}3p^{5}'
electron_configuration_formatted: '[Ne]3s²3p⁵'
electron_configuration_html: '[Ne]3s<sup>2</sup>3p<sup>5</sup>'
atomic_radius: '1.75'
atomic_radius_angstrom: 1.75
electron_affinity: '3.613'
electron_affinity_ev: 3.613
rsc_url: https://www.rsc.org/periodic-table/element/17/chlorine