In a compound, elements are chemically bonded together, which makes it very difficult to separate them. Compounds are not found on the periodic table. For example, water isn’t on the periodic ...

So, all compounds are molecules, and some elements are too. All the different elements are arranged in a chart called the periodic table. A Russian scientist called Dmitri Mendeleev produced one ...

The periodic table, also called the periodic table ... but he predicted the properties of five of these elements and their compounds. In March 1869, he presented the findings to the Russian ...

Want to learn more about this centerpiece of chemistry? Take your pick from this collection of links about elements and the periodic table! Build an element ball, solve periodic puzzles, and check out ...