Just four years before Mendeleev announced his periodic table, Newlands noticed that there were similarities between elements with atomic weights that differed by seven. He called this The Law of ...

But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can ...

When you answer a link box question, draw the number of lines needed to answer the question. The electronic structure of an element is related to its position in the periodic table. Draw one line ...

For the past 150 years, researchers have had the benefit of the periodic table of elements upon which to draw, which tells them that different elements have different properties, and one can't ...