From which of the following atoms would removing an electron be the most difficult?
A)Rb
B)Sr
C)Cd
D)I
E)Xe

Question

Quizplus · Accepted Answer

Xenon (Xe) is a noble gas with a full outer shell of electrons. Removing an electron from this shell would require a significantly higher amount of energy compared to the other listed atoms. The other atoms listed have valence electrons that are more loosely bound and require less energy to remove.

From Which of the Following Atoms Would Removing an Electron