Which of the following elements has the lowest ionization energy?
A) Ar
B) Na
C) Ne
D) Li

Question

Quizplus · Accepted Answer

Sodium (Na) has the lowest ionization energy among the options given because it is located in the first group of the periodic table (alkali metals), which are known for having lower ionization energies compared to noble gases (like Ar and Ne) and other elements due to their single valence electron that is relatively easier to remove.

Which of the Following Elements Has the Lowest Ionization Energy