The name of the ionic compound Na2O is Sodium Oxide.
Sodium oxide is formed when sodium, a metal, reacts with oxygen, a non-metal. In this compound, two sodium (Na) ions combine with one oxide (O) ion. The sodium ion has a +1 charge, while the oxide ion carries a -2 charge. The overall neutral charge of the compound is maintained by the ratio of sodium to oxide ions, which is 2:1 in this case. Sodium oxide is commonly used in glass production and as a key ingredient in ceramics.