Chemical periodicity: why does the chemistry of some elements resemble the chemistry of others?
Before attempting to answer the title question, we should be clear about what the term âperiodicityâ actually meansâand where better to turn for an explanation than the matchless OED. The entry under âchemistryâ is the most relevant, viz. âThe complex periodic variation of the properties of the chemical elements with increasing atomic numberâ, the termâs […]


