• the boroid nonmetals came to expand into the metalloids, starting from as early as 1864; and • varying configurations of the orgaonogen and the sulphuroid nonmetals have been referred to as, for example, basic nonmetals; biogens; central nonmetals; CHNOPS; essential elements; "nonmetals"; orphan nonmetals; or redox nonmetals; they are referred to in this article as unclassified nonmetals.