The periodic table contains more than a hundred chemical elements, the basic building blocks of the everything around us — living and non-living. The atomic number of an element is determined by how ...

Protons are tiny particles just a femtometer across, but without them, atoms wouldn't exist. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Part of Physics (Single Science) Unit 1: Atomic and nuclear physics Protons and neutrons are the heaviest particles in an atom and as a result they make up most of its mass. The mass of electrons is ...

For new, human-made heavy elements on the periodic table, being “too ‘big’ for your own good” often means instability and a fleeting existence. The more protons and neutrons scientists squeeze ...

In order to find the chemical properties of super-heavy elements, chemists must conduct one of the world's most demanding chemical experiments in a matter of seconds. In order to find the chemical ...