Which of the Following Statements About the Effective Nuclear Charge

Multiple Choice

Which of the following statements about the effective nuclear charge, Z_eff, is correct?

A) Z _eff increases with the size of the atom.
B) Z _eff decreases across a period and increases down a group.
C) Z _eff increases across a period and is relatively constant down a group.
D) Z _eff increases as the value of the principal quantum number increases.
E) Z _eff is greater for hydrogen than for any other element.