How would you describe the structure ot an atom?
Up to GCSE it is a very small positive nucleus which has protons and neutrons, surrounded by negative electrons in shells or energy levels around it.
Protons have a charge of
Neutrons are neutral (have no charge) and also have a mass of
Electrons are negative (have a charge of
The first energy shell contains
Beyond GCSE we learn that electrons are arranged in 4 different orbitals named
The "first shell", known at A-level and beyond as the "principal quantum level" has a
The second quantum level has