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The electron in a hydrogen atom falls from an excited energy level to the ground state in two steps, causing the emission of photons with wavelengths of 2624 nm and 97.2 nm, respectively. What is the principal quantum number or shell of the initial excited energy level from which the electron falls
Stomach Ulcer
A sore that develops on the lining of the stomach, often due to infection with H. pylori or prolonged use of nonsteroidal anti-inflammatory drugs.
Lining
Material that covers the inner surface of something, used for protection, insulation, or aesthetic purposes.
Stomach
An organ in the digestive system that secretes acid and enzymes to digest food.
Scar Tissue
Fibrous tissue that forms during the healing process of a wound, potentially leading to changes in skin texture and appearance.
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