It is a kilometre, with symbol km.
Potassium has a chemical symbol that is derived from a Latin name.
The symbol is derived from the name.
The chemical symbol Cf is derived from the name californium and the name is derived from California - a state in USA.
The chemical symbol of berkelium (Bk) is derived from his name.
The name and the symbol (U) of uranium are derived from the name of the planet Uranus.
The chemical symbol of promethium - Pm - is derived from this name.
Silver (symbol Ag).
Ag
Bi is the symbol for bismuth.
The name actinium is derived from the Greek language word aktis with the meaning radiation. The symbol Ac - the first two letters of actinium.
Sulfur has the chemical symbol of "S. " This symbol is derived from its name "sulfur," which is Latin for "brimstone. "
The chemical symbol Cm is derived from two letters of the name.