The most stable (lowest energy) resonance contributor is the one with the greatest number of bonds.
Other related questions:
Q: Which structure is the most stable resonance contributor?
A: The most stable resonance contributor is the one that has the lowest energy.
Q: Which of the following resonance structure is least stable?
A: The least stable resonance structure is the one on the left.
Q: Which structure is the most stable?
A: There is no definitive answer to this question as it depends on a variety of factors, including the specific molecules involved and the conditions under which they are interacting. In general, however, the most stable structures are those that minimize the overall energy of the system.
Q: Which is more stable among the following pair of resonance contributing structures?
A: The first structure is more stable because it has a lower energy.
Q: How do you know which resonance structure is best?
A: The “best” resonance structure is the one that most accurately reflects the true electronic structure of the molecule.
Q: What is a resonance contributor?
A: A resonance contributor is an atom or group of atoms that helps to stabilize a molecule by contributing to its overall resonance.