(b) The energy of the orbit becomes increasingly less negative with increasing n. 2 The Bohr Model of the Hydrogen Atom (a) The distance of the orbit from the nucleus increases with increasing n. In this model n = ∞ corresponds to the level where the energy holding the electron and the nucleus together is zero. In this state the radius of the orbit is also infinite. It was already known that when a charged particle (such as an electron) moves in a curved path, it gives off some form of light and loses energy in doing so. Start by sketching the nucleus, and then draw the two electron shells. To draw the fluorine Bohr model, note the 9 protons, 10 neutrons, and 9 electrons. Encircling this nucleus are two electron shells, carrying a total of 9 electrons. Unfortunately, there was a serious flaw in the planetary model. The Bohr model of Oxygen is drawn with only two electron shells, the first shell contains 2 electrons and the second shell contains 6 electrons. In the fluorine Bohr model, the nucleus holds 9 protons and 10 neutrons. When drawing a Bohr diagram, the valence electrons would be present in the outermost electronic level/shell (furthest away from the nucleus). Valence electrons are located in the highest energy level of an atom. The Bohr Model has an atom consisting of a small, positively charged nucleus orbited by negatively charged electrons. Bohr model of sulfur: (CC BY-SA 2.0 uk Greg Robson). Historically, Bohr’s model of the hydrogen atom is the very first model of atomic structure that correctly explained the radiation spectra of atomic hydrogen. \) is the Rydberg constant in terms of energy, Z is the atom is the atomic number, and n is a positive integer corresponding to the number assigned to the orbit, with n = 1 corresponding to the orbit closest to the nucleus. 3: Niels Bohr with Albert Einstein at Paul Ehrenfests home in Leiden (December 1925). Bohr model of calcium: (CC BY-SA 2.0 uk Greg Robson): Answer b.
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