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There isn't one. There might be alchemical symbols for specific alloys, but unless you're searching for the Philosopher's Stone, those are probably irrelevant to you.
We abbreviate the elements because it's faster and takes up less room than writing the names in full. Pretty much the same reason anybody abbreviates anything. There may be some vestigial traces of alchemical practice there as well, where symbols were used at least partially to keep the uninitiated from understanding alchemical documents, though for the most part scientists actively want for their work to be understood by as many people as possible.
Conventional Symbols are symbols that are used on maps to represent different features.
numbers have symbols so you can see how they look
Only chemical elements have chemical symbols.
Runes
In some ways, yes. Alchemy was a mix of chemistry, spirituality and magic.
Magnum opus is an alchemical term used to describe the process of creating the philosopher's stone. It was first used in the first century. It also has a variety of alchemical symbols attached to it.
He was experienced in the alchemical arts.
There isn't one. There might be alchemical symbols for specific alloys, but unless you're searching for the Philosopher's Stone, those are probably irrelevant to you.
Alchemical Playschool was created in 2006.
Alchemical Healing - 2005 was released on: USA: September 2005
Quicksilver
Quicksilver
Yes.
Elixir?
Quicksilver