Alphonse Atoll Alphonse Atoll Alphonse Atoll is one of two atolls of the Alphonse Group, the other being St. François Atoll — both in the Outer Islands (Coralline Seychelles) coral archipelago of the Seychelles. Alphonse Atoll lies south of the main Amirantes bank, from which it is separated by deep water. It has a distance of south of Victoria, Seychelles. Alphonse lies just north of St. François Atoll, separated from it by a deep channel. The atoll has just one island, Alphonse Island, with a population of 108 people who work in the Alphonse hotel or maintain the runway and island for
Chemical substance and the International Chemical Identifier or InChI. Often a pure substance needs to be isolated from a mixture, for example from a natural source (where a sample often contains numerous chemical substances) or after a chemical reaction (which often give mixtures of chemical substances). Chemical substance A chemical substance is a form of matter having constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be simple substances, chemical compounds, or alloys. Chemical elements may or may not be included in the definition, depending on expert