Chemistry

Question Analysis
This question tests the student's understanding of electron configurations and the Aufbau principle, Pauli exclusion principle, and Hund’s rule.

Key Concept Explanation
The electron configuration of an element describes the distribution of electrons in atomic orbitals.
The Aufbau principle states that electrons fill the lowest-energy orbitals first.
The Pauli exclusion principle limits each orbital to two electrons with opposite spins.
Hund’s rule requires that degenerate orbitals are filled with parallel spins before pairing.

Step-by-step Solution
1. Selenium (Se) has an atomic number of 34, meaning it has 34 electrons.
2. Fill the ...