element_symbol,atomic_radius_pm,first_ionization_energy_kJ_per_mol,electronegativity_pauling
Li,152,520,0.98
Be,111,900,1.57
B,88,801,2.04
N,70,1402,3.04
O,66,1314,3.44
Na,186,496,0.93
Cl,99,1251,3.16
K,227,419,0.82