Pe•ri•od•ic ta•ble
/ˌpirēˌädik ˈtāb(ə)l/
noun [chemistry]
a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
Story by la tabla periodica
Octet Rule
Selenium was a normal element, but always seemed to be missing something. As she had not yet found an element...
