When two hydrogen atoms get close enough, the electron from each atom feels an attraction from the proton in the other atom's nucleus. This attraction pulls the atoms together. The electrons end up ...

Two presenters use animations to show how protons, neutrons and electrons make up atoms. They explain the relative masses, sizes, locations and charges of these subatomic particles. Introduce ...

Atoms are very small. They have a radius of around 1 × 10 10 metres. This symbol shows that chlorine has 35 particles in the nucleus (protons and neutrons), 17 of which are protons. It also tells ...

In the water molecule, the oxygen and hydrogen atoms share electrons in covalent bonds. There are a total of 10 protons and 10 electrons, so the water molecule is neutral. The electron cloud model ...

Tin always has 50 protons, and its most common isotope has 70 neutrons. Isotopes are atoms of the same element that have a ...

It explains the structure of atoms and the process of nuclear fission, leading to chain reactions that release immense energy. The narrative highlights the peaceful applications of atomic energy ...

Chadwick's own research focused on radioactivity. In 1919 Rutherford had discovered the proton, a positively charged particle within the atom's nucleus. But they and other researchers were finding ...