Identify the following statements as either true or false: I: The 1s orbital of an Na atom is smaller than a 1s orbital of an Mg atom. [ Select ] II: In a Ni atom, the effective nuclear charge experienced by the 4s subshell is larger than the effective nuclear charge experienced by the 3d subshell. [ Select ] III: The effective nuclear charge experienced by the core electrons is larger for P than it is for Cl. [ Select ] IV: In an F atom, the effective nuclear charge experienced by an electron in the 2p subshell is larger than it is for an electron in the 2s subshell. [ Select ]多重下拉选择题