Over 100 elements and no one could figure out how to organise them. For decades, chemists fumbled with groupings that didn't quite work. Then Mendeleev came along in 1869 and cracked the code: he arranged elements by atomic mass AND left gaps for elements that hadn't even been discovered yet and he was RIGHT. Today you're exploring the Development of the Periodic Table: a story of failed ideas, brilliant breakthroughs, and one of the greatest organisational tools in the history of science. 📊🧪🏆 Let's go!
16/05/2026, 13:36:23
