Students look more deeply into the structure of the atom and play a game to better understand the relationship between protons, neutrons, electrons, and energy levels in atoms and their location in ...

To appreciate the periodic table, we need to understand that early scientists of the 17th, 18th and 19th century were working with an incomplete knowledge of the elements that existed. They had to ...

Today the periodic table is the starting point for understanding chemistry. On the wall of every laboratory or school chemistry department you are likely to find hung a copy where chemists and student ...

The periodic table is a good example of how scientific ... further confirming that Mendeleev’s understanding was correct. Image caption, The element germanium was discovered in 1886.

The periodic table is a good example of how scientific ... further confirming that Mendeleev’s understanding was correct. Image caption, The element germanium was discovered in 1886.

Since then, the periodic table has evolved to reflect over 150 years of scientific development and understanding in chemistry and physics. Today, with 118 known elements, it is widely regarded as one ...

New discoveries continuously refine our perspective, with many breakthroughs reported regularly. Whether revolutionary or ...

The elements that make up each column of the periodic table share a set of common traits. Here, a chemist describes group 15 and the crucial role phosphorus, in particular, plays in cancer.

On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table.