Final answer:
Sodium and oxygen react to form an ionic compound called sodium oxide.
Step-by-step explanation:
When sodium (Na) reacts with oxygen (O), they form an ionic compound called sodium oxide (Na+O-2). In this compound, the sodium ion (Na+) has lost one electron and carries a positive charge. The oxygen ion (O-2) has gained two electrons and carries a negative charge. The ionic bond is formed due to the attraction between these oppositely charged ions.
Learn more about Ionic species formed from sodium and oxygen