The atomic scale refers to the world of protons, neutrons and electrons that make up everything we see, smell and touch. A single proton is so small that it is impossible to see even with the best equipment available today. A proton has a diameter of 1.75×10^-15 metres. You and I are made from a combination of protons, neutrons and electrons that are fused together to form elements which are electromagnetically bonded together to give us our physical form.
Important!Information taken from Universe, 9th edition, Freedman et al, 2011, ISBN-10: 1-4292-3153-X