Slater's rules subtract a shielding constant from this value.
Atoms with the largest value for this quantity have the highest priority in stereochemistry. Slater's rules subtract a shielding constant from this value. The Rydberg [RIDE-berg] equation sets ionization energy proportional to it squared, over n squared. An increase in the "effective" form of this quantity decreases the (*) atomic radius, within a single period. This quantity increases by one in beta-minus decay but decreases by two in alpha decay. It is normally symbolized Z and written to the bottom-left of the symbol. Mendeleev's key idea was organizing elements based on this quantity in the Periodic Table. For 10 points, name this quantity, the number of protons an atom has.
Atoms with the largest value for this quantity have the highest priority in stereochemistry.
atomic number [or effective nuclear charge; prompt on charge]