This is when he noticed a correlation between atomic weight and chemical properties. However, the exact "Eureka!" moment that led Mendeleev to the sorting strategy of the complete periodic table ...

However, he is remembered for his search for a pattern in inorganic chemistry. Just four years before Mendeleev announced his periodic table, Newlands noticed that there were similarities between ...

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. It's no mean feat, the best ...