Final answer:
C₂H₅ doesn't represent a stable molecule on its own as it doesn't fulfill the octet rule. However, it can be part of a stable compound like C₂H₅OH (ethanol).
Step-by-step explanation:
The chemical formula C₂H₅ technically does not represent a stable molecule. This is because it does not meet the octet rule, which states that atoms in a molecule tend to combine in such a way that each atom has eight electrons in its valence shell when we consider it independently.
However, C₂H₅ can exist as a part of larger, stable compounds, such as C₂H₅OH (ethanol), where the octet rule is satisfied. Thus, while C₂H₅ can be part of a stable molecule, it isn't one on its own.
Learn more about Chemical Stability