Chemistry

Question Analysis
This question involves applying the group trend of first ionization energy to a subset of noble gases.
The main focus is on identifying the element with the lowest ionization energy based on its position in Group 18.

Key Concept Explanation
First ionization energy decreases down a main group. For noble gases, additional electron shells increase atomic radius and shielding, making valence electrons easier to remove.

Step-by-Step Solution
1. Identify the group and order of the elements: He (top) → Ne → Ar (bottom).
2. A...