In which group are the elements listed in correct order of increasing first ionization energy? A) Al Si P B) Na P Cl C) Cs Na K D) K Ca Ge E) Cs

Question

In which group are the elements listed in correct order of increasing first ionization energy? A) Al > Si > P B) Na > P > Cl C) Cs > Na > K D) K > Ca > Ge E) Cs < Rb < Na

Quizplus · Accepted Answer

The first ionization energy generally increases across a period and decreases down a group in the periodic table. Therefore, Cs < Rb < Na is the correct order of increasing first ionization energy.

In Which Group Are the Elements Listed in Correct Order