Where does the symbol of elements taken from?
An abbreviation of the elements name. Some are from their Latin words. E.g. Iron is Fe as in Latin it's ferrous.
The symbol for most elements, in the English speaking world, are one or two letters of their name. The symbols for some elements are based on their Latin names, and in the case of tungsten on its German name. Recently discovered elements whose names have not yet been agreed by IUPAC have three-letter names. However, the names for the last four elements 113, 115, 117 and 118 were approved in June 2016.
Only three: carbon shown by the symbol C, hydrogen shown by the symbol H, and oxygen shown by the symbol O. (Note that this is not the same question as, "How many atoms are in a molecule of glucose". In order to answer that question, the subscripts as well as the element symbols must be taken into account.)
The name of an element depends on who discovered the element and when. Often the names have roots in other languages such as Greek or Latin. Some elements are named after the person who discovered the element or also after other famous scientists to honor that person. For many elements, the symbol is just the first letter (or first two letters) of the name of the element. Note that the symbol for some elements is…