CHEM 20A · Dis 1D

Chemical Structure

Fall 2026 · An unnamed TA · 4 units

Watching is the one thing here that needs an account, because an alert needs somewhere to go. Everything else on this page works signed out.

Open on the registrar

Status: Open; Restrictions read 11 hours ago.
Enrolled: 48 of 49; 98% full; Read 57 minutes ago, and the registrar publishes once an hour, so this is current.
Waitlist: No waitlist
Seat risk: high risk

From the registrar new students only until 15 September

Any student attempting to save or sell a spot for another student is violating Student Conduct Code 102.23d and may be referred to the Office of the Dean of Students. Seats are held for entering students who enroll through New Student Orientation sessions beginning July 2, 2026. New student restrictions will be lifted on September 15, 2026 at 8 a.m. PTE numbers are NOT available; do not contact the instructor for a PTE number.

Held for entering students enrolling through orientation until 15 September. If that is you, the seats are yours now; if not, the class opens to you that morning.

When it meets

Mon

Tue

Wed

Thu

Fri

7am

8am

9am

10am

11am

12pm

1pm

2pm

3pm

4pm

5pm

6pm

7pm

8pm

9pm

10pm

Meets: W 4:00pm-4:50pm

Lecture: MWF 8:00am-8:50am

Dodd Hall 146

Predicted GPA

3.54

course average · 3,673 grades

A range: 70%
P/NP: <1%
D/F/W: 2.4%

Full grade history for CHEM 20A

What students say

Dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

CHEM 20A on BruinWalk

Enrollment over time

A dot is a reading where something moved: the seat count, the status, or the waitlist. The last one is the most recent sweep, moved or not. The line holds flat between dots because that is what the readings say: it did not drift, it held and then jumped. The ticks along the bottom are the hours Dibs recorded reading this section, which is how a flat run says "checked, unchanged" rather than "nobody looked". It only keeps those from 25 August, so the ruler is shorter than the line for now. Both start when Dibs did rather than reaching back before it existed.

Filled by 10 over 12 days

2 times reopened

5037

17 Aug 16:42capacity 4929 Aug 10:42

Show the readings

Recorded	Enrolled	Capacity	Status	Waitlist
29 Aug 10:42	48	49	open	-
26 Aug 00:40	48	49	open	-
25 Aug 23:40	42	48	open	-
25 Aug 22:40	48	49	open	-
25 Aug 21:55	42	48	open	-
25 Aug 20:55	48	49	open	-
25 Aug 19:55	42	48	open	-
25 Aug 19:40	48	49	open	-
24 Aug 19:55	42	48	open	-
24 Aug 17:55	42	44	open	-
24 Aug 15:55	42	48	open	-
24 Aug 14:55	42	44	open	-
24 Aug 12:55	42	48	open	-
24 Aug 11:55	42	44	open	-
24 Aug 10:55	42	48	open	-
20 Aug 23:55	42	44	open	-
20 Aug 22:55	38	42	open	-
20 Aug 21:55	42	44	open	-
20 Aug 20:55	38	42	open	-
20 Aug 19:55	42	44	open	-
20 Aug 18:55	38	42	open	-
20 Aug 17:55	42	44	open	-
19 Aug 14:55	38	42	open	-
19 Aug 13:55	38	38	closed	-
19 Aug 12:55	38	42	open	-
17 Aug 16:42	38	38	closed	-

How big this course usually runs

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

29521F
23122W
30422F
21423W
29223F
22924W
35124F
24525W

Peak 351 · most recent 25W at 245