Drinking Water Treatment Operator Class 1 Practice Exam

The chemical symbol for sodium is represented as Na. This designation comes from the Latin name for sodium, "Natrium." Each element on the periodic table is assigned a unique one- or two-letter symbol, and sodium's designation is critical for identifying it in chemical reactions and contexts.

The other options represent different substances rather than the element itself. NaCl is the chemical formula for sodium chloride, commonly known as table salt, which is made up of sodium and chlorine. NaOH is the formula for sodium hydroxide, a strong base used in various applications, while K represents potassium, another chemical element that is distinct from sodium. Understanding these distinctions is important for recognizing the role of sodium in various chemical contexts.