Atoms are very small, they have a radius of around 0.1 nanometres (1 × 10 -10 metres). The modern view of the atom is of a nucleus containing protons and neutrons with electrons orbiting around ...

The Science In atoms, protons and neutrons orbit the nucleus in one or more shells. Each shell has a specific limit on the number of protons or neutrons it can hold. When these shells are full ...