Atomic

Periodic trend simulator

Na0.9300Mg1.310Al1.610Si1.900P2.190S2.580Cl3.160Na to Cl: effective nuclear charge increases across the period

Electronegativity

Electronegativity generally rises toward fluorine as atoms attract shared electron density more strongly.

Minimum
0.9300 Pauling
Maximum
3.160 Pauling
Model details

Select a property and watch real period-three values shift as nuclear charge and shielding compete.