There is none as acetate is not an element.
However, it's fairly common for chemists to abbreviate it OAc-. That does conflict slightly with actinium, but it's not likely to cause much confusion since very few chemists work with actinium, which is radioactive.
Tin(IV) acetate has the chemical formula (not symbol) Sn(C2H3O2)4.
Sodium acetate is a chemical compound.
Sulfur is the element. The lead-acetate test detects presence of sulfate or sulfide.
There is no element with symbol a or A even
Li is the atomic symbol on the periodic table for Lithium, and C2H3O2 is the configuration for acetate. Together, this reads "Lithium acetate"
Sodium acetate is a compound. Generally, when the name of a substance contains two or more words (unless one of them is solid, liquid, gas, or metal), it is not an element.
The symbol for the element Terbium is Tb
The element symbol for nitrogen is (N).
As is the symbol for the element arsenic.
what is element symbol?
ClO4- Note that this is not an "element" and hence doesn't have an "element symbol."
Take the element "Iron" then the symbol for the element is "Fe" and "Fe" is also the symbol for a single atom of the element in a chemical equation.