Question

which of the following is an example of a chemical element? salt water sugar sodium

Explanation:

A chemical element is a pure substance made up of only one type of atom. Salt (sodium - chloride) is a compound of sodium and chlorine. Water ($H_2O$) is a compound of hydrogen and oxygen. Sugar is a compound with carbon, hydrogen, and oxygen atoms. Sodium is an element with the symbol Na and is found on the periodic table.

Answer:

Sodium