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Atomic nucleus from Wikipedia.url Atomic Theory.url Atom on Wikipedia.url BohrModel_related_concepts_example.cmap Electronic Structures and Periods.url From spectra lines to Bohr model.url History of Nuclear Atom and related Chemistry.url Langmuir's model.url Langmuir model of the Atom criticized by Bury.url Lenard dynamids model.url Lewis Atom.url Lewis Cubic Atom Criticized.url Lewis molecules with cubic atoms.url Quantum Atom by Encarta.url Quantum Atom by Florida University.url Quantum Mechanics.url Quantum Numbers.url Some pages of History.url Two Strategies for Encouraging Functional Relationships in Concept Maps.url uncertainty.url Waves and Matter.url