Chemistry

Question Analysis
This question tests the definition of second ionization energy using a chemical equation. The main focus is on distinguishing between first, second, and successive ionization processes.

Key Concept Explanation
First ionization energy: Energy to remove the first electron from a neutral atom (X → X⁺ + e⁻).
Second ionization energy: Energy to remove the second electron from a +1 cation (X⁺ → X²⁺ + e⁻).
Each successive ionization involves removing an electron from a more positively charged ion.

Step-by-Step Solution
1. Identify the reactant and product for second ionization: reactant is a +1 cation, product is a +2 cation.
2. Evaluate each option:
A: First ionization (neutral → +1).
B: Second ionization (+1 → +2).
C: Thi...