Which element is represented by the symbol Na?

The symbol Na represents sodium, which is a chemical element with the atomic number 11 on the periodic table. The name "sodium" is derived from the Latin word "sodanum," which refers to a type of soda or mineral salt. Sodium is an alkali metal, known for its highly reactive nature, especially in the presence of water. It plays important roles in biological systems, such as maintaining fluid balance and conducting electrical impulses in nerves.

Magnesium, calcium, and strontium are other elements that have distinct symbols (Mg, Ca, and Sr, respectively) and do not share the same properties or classifications as sodium. Understanding the characteristics and identification of elements based on their symbols is crucial for scientific literacy and applying chemistry knowledge effectively.