Fill in the blank by selecting a correct word given in the brackets.
In the formation of MgO, each Mg atom transfers __________ to the O atom. (one electron/two electrons)

Explanation

To solve the question, we need to analyze the electronic configurations of magnesium (Mg) and oxygen (O) and understand how they interact during the formation of magnesium oxide (MgO).

### Step-by-Step Solution:

1. **Identify the Atomic Numbers**:
- Magnesium (Mg) has an atomic number of 12.
- Oxygen (O) has an atomic number of 8.

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