Students learn to describe the pattern in atomic number, atomic mass and atomic radius. Trends on the Periodic Table: Students learn to describe the pattern in atomic number, atomic mass, atomic ...

Conventional neutron numbers are based on the approximations that the mass of the electron is zero and that those of the proton and neutron are each equal to unity. It was shown, by using the exact ...

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

Looking for ways to revise GCSE Chemistry? Try listening to these revision podcasts from Bitesize and BBC Sounds. BBC Sounds is where you can catch the latest music tracks, discover binge-worthy ...

It is an icon of natural science and hangs in most chemistry classrooms: the periodic table of elements, which is celebrating its 150th birthday this year. The tabular overview is closely linked to ...

Explore the periodic table! Discover the history and key facts about each element, including atomic number, mass, symbol, and the scientists who discovered them.