When two atoms combine to form a molecule

Options

A. Energy is released
B. Energy is absorbed
C. Energy is neither released nor absorbed
D. Energy may either released or absorbed

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the energy changes that occur when two atoms combine to form a molecule.

2. **Valence Bond Theory**: According to the Valence Bond Theory (VBT), when two atoms approach each other, they can form a bond by overlapping their atomic orbitals.

3. **Energy Changes During Bond Formation**:
- When two atoms come closer and form a bond, they transition from a higher energy state (individual atoms) to a lower energy state (bonded molecule).
- This process typically involves the release of energy.

4. **Stability of the Molecule**:
- The release of energy during bond formation indicates that the resulting molecule is more stable than the separate atoms. The potential energy of the system decreases, leading to a more stable configuration.

5. **Conclusion**:
- Therefore, when two atoms combine to form a molecule, energy is released.
- This leads us to conclude that the correct answer is the first option: "energy is released".

### Final Answer:
The correct option is: **Energy is released**.

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