Write the formulae of sodium oxide

Explanation

To write the formula of sodium oxide, follow these steps:

### Step 1: Identify the elements involved
- Sodium oxide is composed of sodium (Na) and oxygen (O).

### Step 2: Determine the charges of the ions
- Sodium (Na) forms a cation with a charge of +1 (Na⁺).
- Oxygen forms an anion with a charge of -2 (O²⁻).
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