Final answer:
The normal sound to elicit when percussing over the liver at the specified location is a dull sound. This is due to the density of the liver as a solid organ containing relatively little air.
Step-by-step explanation:
When percussing in the seventh right intercostal space at the midclavicular line over the liver, the normal sound to elicit is dullness. This is because the liver is a solid organ, and solid organs produce a dull sound on percussion due to their density, which does not allow for the resonance that is heard over air-filled spaces. Percussion sounds such as tympany are typically heard over the stomach due to air within the organ, while resonance is normally heard over the lung fields which are air-filled. Hyperresonance may be heard in cases of excessive air, such as a pneumothorax. The sound heard over the liver should lack the resonance or tympany heard in these other conditions.