The changing models of atomic structure over time and the use of evidence to accept or reject particular models. Atomic structure in terms of the numbers of protons, neutrons and electrons for atoms and ions, given the atomic number, mass number and any ionic charge....
regarding the structure of the rare gases (He, Ne, Ar, so on) at terribly low temperatures. These substances all crystallize in one in all four basic structures: straightforward cube like (SC), body-cantered cube like (BCC), polygon closest-packed (HCP), and cube like closest-packed (...