atomic_number: 68
symbol: Er
name: Erbium
category: Lanthanide
category_label: Lanthanide
period: 6
group: null
group_label: Lanthanide
block: f
grid_row: 9
grid_col: 15
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: false
atomic_mass: '167.259'
atomic_mass_value: 167.259
atomic_mass_most_stable_isotope: false
oxidation_states: '*3*'
oxidation_states_parsed:
- state: '3'
  common: true
ionization_energy: '6.108'
ionization_energy_ev: 6.108
electron_configuration: '[Xe] 4f^{12}6s^{2}'
electron_configuration_formatted: '[Xe]4f¹²6s²'
electron_configuration_html: '[Xe]4f<sup>12</sup>6s<sup>2</sup>'
atomic_radius: '2.29'
atomic_radius_angstrom: 2.29
electron_affinity: U
electron_affinity_ev: null
rsc_url: https://www.rsc.org/periodic-table/element/68/erbium