Life on Earth is composed of a handful of essential elements from the periodic table. Recently, one group of researchers claimed that this ingredient list should be expanded, having found a bacteria ...

A diet that lacks even obscure elements like selenium will leave almost any creature on earth sick and hobbled, if not dead. Plants are made of the same basic stuff as animals but have different ...

Creating mnemonic phrases can help you remember the order of elements, especially for the first 20 elements or specific groups. These phrases are general and are available on other free online sources ...