Atomic nucleus

South Pasadena ? AP Chemistry Name ________________________________ Period ___ Date ___/___/___ 2 ? Atoms and Elements ATOMIC STRUCTURE? Parts of Atoms: Most people already know that the atom is made up of three main parts, the _______________ and ______________ in the nucleus and the ______________ somewhere outside of the nucleus. Let?s summarize: proton neutron electron symbol charge location mass size (see below) Let?s make this more visual using information from the Chart of Fundamental Particles. If the proton were 10 cm in diameter? the size of an orange, how big would everything be? object actual size model size model proton 10-15 m 10 cm orange neutron 10-15 m electron 10-18 m atom 10-10 m