The Chemistry Placement Exam has a maximum score of 20. Each question has one 'correct' answer, though fractions of a point are awarded in some cases for answers that are partially correct or suggest that most of a calculation was done correctly.
Students with scores of 11.0 or above should enter the department's curriculum with CHEM 116. Students with scores above about 15.0 may wish to speak to a member of the department about advanced placement options, though that normally involves taking an additional (longer) placement exam.
Students with scores in the range 9.0 - 10.9 should also start with CHEM 116, though they may discuss their options with a department member if they found the exam particularly difficult.
Students with scores below 9.0 will probably be better served by starting with CHEM 115 and doing both 115 and 116 if they intend to take additional chemistry or if their major or minor requires the completion of 116. Students near that borderline may, of course, discuss their background and performance with a member of the department if they wish to do so.