atomic_number: 72
symbol: Hf
name: Hafnium
category: TransMetal
category_label: Transitional Metal
period: 6
group: 4
group_label: 4 IVB
block: d
grid_row: 6
grid_col: 4
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: false
atomic_mass: '178.486'
atomic_mass_value: 178.486
atomic_mass_most_stable_isotope: false
oxidation_states: '*4*'
oxidation_states_parsed:
- state: '4'
  common: true
ionization_energy: '6.825'
ionization_energy_ev: 6.825
electron_configuration: '[Xe] 4f^{14}5d^{2}6s^{2}'
electron_configuration_formatted: '[Xe]4f¹⁴5d²6s²'
electron_configuration_html: '[Xe]4f<sup>14</sup>5d<sup>2</sup>6s<sup>2</sup>'
atomic_radius: '2.23'
atomic_radius_angstrom: 2.23
electron_affinity: '0.014'
electron_affinity_ev: 0.014
rsc_url: https://www.rsc.org/periodic-table/element/72/hafnium