This 1868 table listed the elements in order of atomic weight, with elements with the same valency arranged in vertical lines, strikingly similar to Mendeleev’s table. Unfortunately for Meyer, his ...

At the heart of our biological composition are four elements: oxygen (O), carbon (C), hydrogen (H) and nitrogen (N). These account for 96.6 per cent of our body weight. These four elements work ...

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 periodic table of elements (often known simply as the periodic table) has been helping scientists with their work for a little over 150 years. The handy visual reference guide organizes known ...

He wrote the properties of the elements on pieces of card and rearranged them until he realised that, by putting them in order of increasing atomic weight ... of the periodic table above separates ...