Three children have been kidnapped for ransom. The prime suspect is their estranged father, a chemist who has become unhinged. Cryptic letters have been left with clues to the childrens whereabouts and it is up to you to solve the riddles.
Problem written by: Khoi Nguyen, Xinyu Cheng, and Dina Abu Baker
Curriculum items covered: Quantum numbers, periodic trends, Hund's rule.