Final answer:
No, the Rydberg constant cannot be applied to determine energy changes in mercury emission lines as it is specific to hydrogen.
Step-by-step explanation:
No, the Rydberg constant cannot be applied to determine changes in energy observed in mercury emission lines.
The Rydberg constant is specific to hydrogen and is derived from the Bohr quantum model of the hydrogen atom. It allows us to calculate the change in energy involved in electronic transitions between excited states and a state where nf=2 in hydrogen atoms.
However, the Rydberg constant does not apply to other elements like mercury. Each element has its own set of emission lines and energy transitions that require specific constants and formulas for accurate calculations.