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Dibs Fall 2026

CHEM 20AH

Chemical Structure (Honors)

Lecture, three hours; discussion, one hour. Preparation: high school chemistry or equivalent background, high school physics, and three and one half years of high school mathematics. Enforced corequisite: Mathematics 31A. Honors course parallel to course 20A. P/NP or letter grading.

Course statistics

Predicted GPA
3.70
n = 154 · 4 terms · ± 0.042
A range
72%
of letter grades
Taken P/NP
0%
— of those passed
D / F / W
0.0%
incl. withdrawals

Sections in Fall 2026

Sections offered, with live enrollment and predicted GPA
Section Status Enrolled Seat risk Meets Instructor Predicted GPA
Lec 1 Closed
30 of 30
100% full
 fills MWF 12:00pm-12:50pm Narang, P.
3.85n=41 · this instructor

Enrollment history

Final enrollment per term, averaged across that term's sections. Four years deep, summer excluded. Per-section live curves are on each section page.

  • 4421F
  • 3822F
  • 3123F
  • 4124F
Enrolment by term: 21F 44, 22F 38, 23F 31, 24F 41
Peak 44 Most recent 41 in 24F 4 terms on record

Grade distribution

  • A+ 48 · 31.0%
  • A 50 · 32.3%
  • A- 13 · 8.4%
  • B+ 20 · 12.9%
  • B 17 · 11.0%
  • B- 5 · 3.2%
  • C 1 · 0.6%
  • I 1 · 0.6%

Grey bars are non-letter outcomes — P/NP, S/U, incompletes. They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.

By instructor

Instructor Predicted Raw n Terms A range
GELBART, WILLIAM M 3.63 3.62 82 2 61%
NARANG, PRINEHA 3.85 3.90 41 1 88%
KAVNER, ABBY 3.73 3.75 31 1 81%

“Predicted” is shrunk toward the course average, which is itself shrunk toward the department — so an instructor with a handful of students sits near the course mean rather than topping the list.

By term