atomic_number: 27
symbol: Co
name: Cobalt
category: TransMetal
category_label: Transitional Metal
period: 4
group: 9
group_label: 9 VIIIB
block: d
grid_row: 4
grid_col: 9
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: false
atomic_mass: '58.933'
atomic_mass_value: 58.933
atomic_mass_most_stable_isotope: false
oxidation_states: 3 *2* 0 -1
oxidation_states_parsed:
- state: '3'
  common: false
- state: '2'
  common: true
- state: '0'
  common: false
- state: '-1'
  common: false
ionization_energy: '7.881'
ionization_energy_ev: 7.881
electron_configuration: '[Ar] 3d^{7}4s^{2}'
electron_configuration_formatted: '[Ar]3d⁷4s²'
electron_configuration_html: '[Ar]3d<sup>7</sup>4s<sup>2</sup>'
atomic_radius: '2.0'
atomic_radius_angstrom: 2.0
electron_affinity: '0.662'
electron_affinity_ev: 0.662
rsc_url: https://www.rsc.org/periodic-table/element/27/cobalt