A PowerPoint to introduce students to the scale of atoms and the nucleus, including how to estimate the diameter of an atom from density measurements, how alpha particle scattering leads to the size of the nucleus, calculations of the density of nuclear material and some background to relative atomic mass and the atomic mass unit. Aimed primarily at A-level students (and following the OCR Physics A specification), but could be used in parts with GCSE students also. One of a bundle of presentations on different aspects of nuclear physics. Please note that TES’s software doesn’t always seem to generate accurate thumbnail images of PPTs with background images, so if the preview images look odd on your display they aren’t indicative of what the slides actually look like.