- Cascais Capital Europeia da Juventude 2018
- 1,440 people
- Portugal (Cascais)
The largest chemistry lesson consists of 1,440 participants and was achieved by Cascais Capital Europeia da Juventude 2018 (Portugal) in Cascais, Portugal, on 27 November 2018.
This record attempt was held in celebration of Cascais being awarded the title of 'European Youth Capital' for 2018.