What is the correct formula for the compound made from sodium and oxygen?

The correct formula for the compound made from sodium and oxygen is Na₂O.

Here’s a breakdown of how we arrive at this formula:

1. Understanding the Elements: Sodium (Na) is an alkali metal, and it has a +1 charge when it forms compounds. Oxygen (O), on the other hand, is a non-metal that typically forms an oxide with a -2 charge.
2. Balancing the Charges: When forming a compound, the total positive charge must balance the total negative charge. Since sodium has a +1 charge, it takes two sodium atoms to balance the -2 charge from one oxygen atom.
3. Writing the Formula: Hence, the empirical formula for sodium oxide is written as Na₂O, indicating that there are two sodium ions for every one oxide ion in the compound.

In summary, sodium oxide is formed from the combination of sodium and oxygen in a 2:1 ratio, resulting in the formula Na₂O.