Hello I'm going into PNB this year ( going from first year to second year) and was wondering if I can take chem 2OA3 and 2OB3 in the summer of next year (taking in the summer of second year to third year) or if it has to be during fall of second year

Yup, you can definitely do that! I believe Chem 2OA3/2OB3 isn't a prerequisite for any upper year psych courses.

All the best!

As long as your program does not require the completion of those 2 courses "prior to completion of Level II" or they aren't prereqs for anything else you want to take, you'll be fine