The basic difference between Bohr model and Quantum mechanical model.

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Chapter 8, Problem 6FFA

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To describe: The basic difference between Bohr model and Quantum mechanical model.

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Select all of the following statements that are basic assumptions of the Bohr model of the atom. A) Atoms have a central nucleus with electrons in orbit about this nucleus. B) Atoms are solid spheres of matter.Atoms are made of positive material with electrons fixed in place in this positive material. C) Electrons orbit the nucleus, but the orbits can have only certain sizes and energy values. D) Electrons can jump from one orbit to another around the nucleus. E) They must gain energy to jump to a higher level, and they release energy when jumping to a lower level.

A neutral atom of the element boron (B) has 5 electrons. Four of the electrons are removed, forming an ion with the one remaining electron. a) Sketch an energy level diagram for this ion, showing the ground state and the first two excited states. Label each state with the value of its energy. b) Calculate the two longest wavelengths at which this ion can absorb radiation. Assume all absorption occurs from the ground state. c) What is the minimum amount of energy needed to remove the electron from the ground state of this ion?

Select statements that are appropriate for the Bohr model of an atom. Select one or more: a. The angular momentum of the revolving electron in stationary orbits is an integer multiple of the reduced Planck constant b. Electrons form a cloud around a heavy nucleus. c. The electron is able to revolve in certain stable orbits around the nucleus without radiating any energy.