atomic_number: 2
symbol: He
name: Helium
category: NobleGas
category_label: Noble gas
period: 1
group: 18
group_label: 18 VIIIA
block: s
grid_row: 1
grid_col: 18
phase: gas
lab_made: false
radioactive_marker: false
is_radioactive: false
atomic_mass: '4.003'
atomic_mass_value: 4.003
atomic_mass_most_stable_isotope: false
oxidation_states: '*0*'
oxidation_states_parsed:
- state: '0'
  common: true
ionization_energy: '24.59'
ionization_energy_ev: 24.59
electron_configuration: 1s^{2}
electron_configuration_formatted: 1s²
electron_configuration_html: 1s<sup>2</sup>
atomic_radius: '1.4'
atomic_radius_angstrom: 1.4
electron_affinity: Ns
electron_affinity_ev: null
rsc_url: https://www.rsc.org/periodic-table/element/2/helium