How do shared electrons contribute to the stability of molecules?

Shared electrons contribute to the stability of molecules by forming chemical bonds between atoms. When atoms share electrons in covalent bonds, they achieve a more stable electron configuration, typically resembling that of noble gases. This sharing allows atoms to satisfy their valency and attain a lower energy state, increasing the overall stability of the molecule. Additionally, shared electrons create electrostatic attractions that hold atoms together, preventing them from separating easily. As a result, molecules maintain their structure and integrity, enabling them to exist in a stable state under various conditions and resist decomposition or chemical breakdown.