The particles that are in an atom: protons, neutrons and electrons The particles that are in protons and neutrons: quarks The four fundamental forces: gravity, electromagnetism, the strong force and ...

One of the most amazing scientific discoveries of the last two centuries was created using nothing more than a pen and a piece of paper by Dmitri Mendeleev in 1869: the periodic table. He was ...

Chemists use symbols and formulae to represent elements and compounds. Word equations and balanced chemical equations represent the changes that happen in chemical reactions. Mixtures - AQA There are ...

The goal of the activity is to build a carbon atom out of elementary particles (up quarks, down quarks, and electrons). On the left side of the activity's window sits the particle dispenser. Dragging ...

The discovery of four new elements, the heaviest ones in the Mendeleev periodic table is now a hot topic of discussion worldwide. This recalls the story about a Vietnamese scientist who discovered the ...