helium
Potassium, with an Atomic Number of 19, is designated by the symbol 'K'.
There is no element with symbol a or A even
Symbol describes an element. It notates name of element.
The symbol of the element is used as an abbreviation for its name.
Bi is the symbol for the chemical element 'Bismuth'.
The element xenon got its symbol Xe from its name, which is derived from the Greek word "xenos" meaning stranger. Xenon was considered a rare and unreactive element when it was discovered, hence the name and symbol.
Every element has a one or two (or three, if the element doesn't have an official name yet) letter symbol.
The element with the symbol Au is gold.
The element lead's symbol "Pb" comes from its name in Latin: Plumbum
The element with the chemical symbol Ag is silver.
cupprum
helium