The Phenomenon Resulting from the Weakly Effective Screening of Outermost

Multiple Choice

The phenomenon resulting from the weakly effective screening of outermost electrons from the nucleus by f subshell electrons,resulting in only small differences in atomic radii in elements of atomic number 58-71,is called the:

A) actinide expansion
B) f-subshell extension
C) lanthanide contraction
D) elemental transition
E) lattice distortion