Can you name everything from Ac to Zr? Test your knowledge of the periodic table and see if you can top the leaderboard ...

University of Nottingham’s chemistry professor Martyn Poliakoff says that most chemists don’t know the atomic number of most elements and that it’s a pain to look in the periodic table. That ...

This video is an interactive lesson in calculating an atom’s mass and atomic number. Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells. The numbers of ...

The elements of the periodic table are defined by the number of protons in the atomic nucleus - the atomic number - so how can there be gaps for new elements?

The periodic table orders all the elements in neat rows and columns as a guide to their properties and atomic structures. Atomic structure, in fact, explains why the periodic table works, but this ...

Manvendra memorised each element’s name, atomic number, and atomic mass, accurate to two decimal places, and recited them ...

Five elements at the heart of the periodic table will never look the same again, following an update to their atomic weights ...

A new study suggests that atoms could be stable at atomic number 164, which could help explain recent measurements of the ultradense asteroid 33 Polyhymnia.

The periodic table of elements—also known as Mendeleev’s table—was developed in 1869 by Russian chemist Dmitri Mendeleev. It organizes all known chemical elements by their atomic number ...