In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, atomic weight and the broad group they live in.

A century ago, the discovery of hafnium confirmed the validity of the periodic table — but only thanks to scientists who stood up for evidence at a time of global turmoil.

The petition argues that providing a periodic table during exams would shift the focus from memorization to application, which is better suited for demonstrating students’ command of chemistry.