Answer:
Sodium
Step-by-step explanation:
Air is a mixture of different gases, primarily nitrogen, oxygen, carbon dioxide, and trace amounts of other gases. It is not a compound because it does not consist of chemically bonded elements.
Nitrogen, on the other hand, is an element. It exists as individual nitrogen molecules (Nā) and is not a compound.
Sodium (Na) is an element as well. However, sodium can form compounds when it combines with other elements, such as sodium chloride (NaCl) or sodium hydroxide (NaOH). These compounds involve a chemical bond between sodium and other elements.