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What is the minimum energy that a photon must have to ionize a hydrogen atom from the n = 3 energy level?
Obstacles
Barriers or hurdles that impede progress or achievement in any endeavor.
Cherokee Nation
A sovereign tribal government of the Cherokee people, native to the southeastern United States, with a complex history of displacement, survival, and legal battles for their rights and land.
Creek
A Native American people historically inhabiting the southeastern United States, renowned for their rich cultural heritage, including their art, rituals, and governance structures.
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