What is Stock system name against classical system name?

Answer 1

Stock name refers to the name directly on the Periodic Table of Elements, while the classical name does not (often relates to element abbreviations however). For example, Sodium (Na) is the stock name, while Natrium is the classical name. The complexity increases, especially when created ionic and covalent bonded compounds. Certain transition metals have multiple ways to bond (different # of electrons depending on other element). For instance, Iron (Fe) can have both 2 or 3 valence electrons. If Iron were to bond with Oxygen (O), it was use the 2 valence electron configuration. The classical name of Iron is Ferrum, but when bonding with oxygen it would be called Ferrous Oxide. If it bonded with Nitrogen (N), it would be called Ferric Nitride. In cases where 2 sets of valence electrons are plausible, the classical name gains the suffix -ous for the lesser of the two configurations, while -ic for the greater of the configurations.