Bohr’s Model of an Atom: Danish Physicist Niels Bohr received his Ph.D. from the University of Copenhagen in 1911. In 1922, he was awarded the Nobel Prize in Physics for his work on the atom’s ...

This makes the droplet a model of an atom with the added bonus that its size can be varied. It provides deeper insights into how light scatters while being a model for understanding how atoms work.

Since a nucleus contains protons and neutrons, most of the mass of an atom is concentrated in its nucleus. Protons and electrons have opposite electrical charges.

In atomic-scale systems such as atom clusters 2 and single-molecule magnets 3,4, the exchange coupling of a few spins can give rise to magnetic states that are stable at low temperature.