Here's why:

* Kerosene is not an element: It's a mixture of hydrocarbons, which means it's made up of different types of molecules containing carbon and hydrogen.

* Atomic symbols represent elements: Atomic symbols like "H" for hydrogen or "C" for carbon are used to represent individual elements.

You could potentially write a chemical formula for a specific hydrocarbon present in kerosene, but there isn't a single atomic symbol to represent the entire mixture.