A patient is diagnosed with a Pneumothorax on the right lung. During the assessment, when percussing this area the nurse expects to find the percussion note as:

A. Flatness: This percussion note is typically associated with areas of high density, such as over muscle or a solid organ like the liver. In a pneumothorax, the lung tissue is not solidified, so flatness is not expected. B. Dullness: Dullness is generally noted over fluid-filled areas or solid structures, such as a pleural effusion or a mass. In the case of a pneumothorax, where there is air in the pleural space, dullness would not be the expected finding. C. Resonance: Resonance is the normal percussion note over healthy lung tissue. It indicates normal air-filled lung spaces. In a pneumothorax, the increased air in the pleural space causes an abnormal note. D. Hyperresonance: This percussion note is associated with increased air in the pleural space, as seen in conditions like a pneumothorax. The extra air causes a more resonant, hollow sound when percussed, distinguishing it from normal lung resonance.