Chemistry

Question Analysis
This question involves Hund’s Rule and unpaired electron counting.
The main focus is on applying Hund’s Rule to the 2p subshell and determining how many electrons remain unpaired.

Key Concept Explanation
Hund’s Rule: Electrons occupy degenerate orbitals (same energy, e.g., 2pₓ, 2pᵧ, 2p_z) singly with parallel spins before any orbital is doubly occupied. Unpaired electrons are those without a partner in an orbital.

Step-by-Step Solution
1. C has 6 electrons; full configuration: 1s²2s²2p².
2. The 1s and 2s subshells are fully filled (no unpaired electrons).
3. The 2p subshell has 3 degenerate orbitals. By Hun...