Question

considering periodic trends, valence electrons in which of the following atoms experience the greatest effective nuclear charge (zeff)? a) b b) c c) f d) ne e) o

Explanation:

Effective nuclear charge ($Z_{eff}$) increases across a period from left - to - right. This is because the number of protons in the nucleus increases while the shielding effect of inner - shell electrons remains relatively constant. Among B (boron), C (carbon), O (oxygen), F (fluorine), and Ne (neon), Ne is on the far right of the period. It has the most protons among these elements in the same period, with the least amount of additional shielding compared to the increase in nuclear charge.

Answer:

D. Ne