How many yoctoseconds are in a second?
A fun and interactive challenge to test your knowledge of chemistry and notable chemists.

What is a Yoctosecond?

Guess the Chemist (52)
Can you guess the famous scientist from the description?

Guess the Character
Can you guess the fictional chemist from the description?

Opening Lines of Famous Papers
Can you guess important scientific articles by their first line?

Guess the Chemist (51)
Can you guess the famous scientist from the description?

50th Guess the Chemist
Could you have guessed all the famous scientists?

Guess the Chemist (50)
Can you guess the famous scientist from the description?

Guess the Chemist (49)
Can you guess the famous scientist from the description?

Chemistry of Fireworks
What does gunpowder consist of?

Opening a Champagne Bottle
What is the white fog or smoke that appears as a champagne bottle is opened made of?