Places are based on a written test given in March. There are two divisions: the Regular Division exam is open to students who are in their first year of high school chemistry (other than an AP course); the Advanced Division to those taking their second high school chemistry course or AP chemistry. Each exam has a multiple-choice section and then a “tie breaking” section that consists of short-answer and essay questions.
The 2013 winners are listed below. This year’s Advanced Division top finisher is a repeat winner. Runpeng Liu also won in 2012 and went on to qualify for the International Chemistry Olympiad for USA qualifiers held in Colorado Springs last summer.
Update: Runpeng Liu qualified again for the Colorado Springs Training Camp, earned a spot on Team USA, and took a Gold Medal at the 45th International Chemistry Olympiad in Moscow. Way to go!
| Regular Division | |||
| Place | Student | School | Teacher |
| 1st | Amanda Cao | John Burroughs School | Sandra Mueller |
| 2nd | William Meng | John Burroughs School | Eric Knispel |
| 3rd | Stephen He | Parkway Central High School | Beth Karfs |
| 4th | Zach Heiman | Parkway Central High School | Ken Greathouse |
| 5th | Andrew Roykhman | Parkway Central High School | Ken Greathouse |
| HM | David Ryffel | Clayton High School | Mike Howe |
| HM | Kim Minki | Parkway Central High School | Ken Greathouse |
| HM | Jeffrey Friedman | Clayton High School | Mike Howe |
| HM | Alex Mesnier | Parkway Central High School | Ken Greathouse |
| HM | Aby Sarangee | Parkway Central High School | Ken Greathouse |
| HM | Ross Leung Wagner | Clayton High School | Mike Howe |
| HM | Nathaniel Rowe | Clayton High School | Mike Howe |
| HM | Andrew Efimov | John Burroughs School | Eric Knispel |
| HM | Pietro Vannucci | Clayton High School | Brad Krone |
| HM | Nathan Hock | Saint Louis University High School | Mary Russo |
| Advanced Division Students who do well in the Advanced Division qualify for the National Chemistry Olympiad. Names of qualifiers for the National Chemistry Olympiad exam are in italics. No more than two students may qualify from a single school. HM = honorable mention |
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| Place | Student | School | Teacher | 1st | Runpeng Liu | Ladue Horton Watkins High School | Marina Smallwood |
| 2nd | Noah Youkilis | Clayton High School | Nathan Peck |
| 3rd | Doren Lan | Clayton High School | Nathan Peck |
| 4th | Harrison Garrett | Clayton High School | Nathan Peck |
| 5th | Ellie Gund | Clayton High School | Nathan Peck |
| HM | Elaine Reichert | Parkway Central High School | Ken Greathouse |
| HM | Jeffrey Cheng | Clayton High School | Nathan Peck |
| HM | Curtis Rother | Clayton High School | Nathan Peck |
| HM | Joshua Zeid | Parkway Central High School | Ken Greathouse |
| HM | Stephen Eastman | Francis Howell Central High School | John Kozlowski |
| HM | Kirk Smith | John Burroughs School | Sandra Mueller |
| HM | Joseph Roddy | John Burroughs School | Sandra Mueller |
| HM | Jonathan Brand | Parkway Central High School | Ken Greathouse |
| HM | Felipe d’Andrea | Lafayette High School | Jeff Marx |
| HM | Sophia Rotman | Clayton High School | Nathan Peck |