Which has the highest Z_eff for its valence electrons? A)Na B)Mg C)Si D)Cl

Question

Quizplus · Accepted Answer

Chlorine (Cl) has the highest effective nuclear charge (Z_eff) for its valence electrons among the given options. This is because as you move across a period in the periodic table, the nuclear charge increases due to the addition of protons, but the shielding effect by inner electrons does not significantly increase. Therefore, electrons in the same shell experience a stronger effective nuclear charge. Since chlorine is furthest to the right in its period among the given options, its valence electrons are held more tightly by the nucleus, indicating a higher effective nuclear charge.

Which Has the Highest Zeff for Its Valence Electrons

Which Has the Highest Z_eff for Its Valence Electrons