Of the following,which element has the highest first ionization energy?
A)barium
B)cesium
C)indium
D)rubidium

Question

Quizplus · Accepted Answer

Indium has the highest first ionization energy among the given options because it has a relatively small atomic radius and high effective nuclear charge, making it less likely to lose an electron. Barium and cesium, on the other hand, have larger atomic radii and lower effective nuclear charges, making them more likely to lose an electron. Rubidium falls in between cesium and indium in terms of first ionization energy.

Of the Following,which Element Has the Highest First Ionization Energy