atomic_number: 20
symbol: Ca
name: Calcium
category: AlkalineEarthMetal
category_label: Alkaline Earth Metal
period: 4
group: 2
group_label: 2 IIA
block: s
grid_row: 4
grid_col: 2
phase: solid
lab_made: false
radioactive_marker: false
is_radioactive: false
atomic_mass: '40.078'
atomic_mass_value: 40.078
atomic_mass_most_stable_isotope: false
oxidation_states: '*2*'
oxidation_states_parsed:
- state: '2'
  common: true
ionization_energy: '6.113'
ionization_energy_ev: 6.113
electron_configuration: '[Ar] 4s^{2}'
electron_configuration_formatted: '[Ar]4s²'
electron_configuration_html: '[Ar]4s<sup>2</sup>'
atomic_radius: '2.31'
atomic_radius_angstrom: 2.31
electron_affinity: '0.02455'
electron_affinity_ev: 0.02455
rsc_url: https://www.rsc.org/periodic-table/element/20/calcium