The atomic model consists of a nucleus containing protons and neutrons, surrounded by electrons in shells. The numbers of particles in an atom can be calculated from its atomic number and mass number.

Atoms are very small. They have a radius of around 1 × 10 10 metres. The modern view of the atom close atomThe smallest part of an element that can exist. is of a nucleus close nucleusThe central ...

Allmendinger, T. (2025) A Planar Atom Model of Helium Based on Well-Defined Electron Trajectories. Journal of Applied ...

One hundred years ago, Ernest Rutherford decided to shoot some stuff at atoms and toppled then-current atomic theory. Physicist and blogger Rhett Allain walks through the rise of six atomic models.

First open-source all-atom models of S protein The scientists produced the first open-source all-atom models of a full-length spike protein of the SARS-CoV-2 that facilitates entry into host cells.