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Electrons 1.notebook 5.1 November 13, 2012 The Development of Atomic Models The timeline shoes the development of atomic models from 1803 to 1911. 5.1 The Development of Atomic Models The timeline shows the development of atomic models from 1913 to 1932. Oct 113:07 PM 5.1 The Bohr Model Oct 113:07 PM 5.1 The Bohr Model Bohr proposed that an electron is found only in specific circular paths, or orbits, around the nucleus. What was the new proposal in the Bohr model of the atom? Oct 113:07 PM 5.1 The Bohr Model The Bohr Model Oct 113:07 PM The Bohr Model 5.1 Each possible electron orbit in Bohr’s model has a fixed energy. > > The fixed energies an electron can have are called energy levels. Like the rungs of the strange ladder, the energy levels in an atom are not equally spaced. The higher the energy level occupied by an electron, the less energy it takes to move from that energy level to the next higher energy level. A quantum of energy is the amount of energy required to move an electron from one energy level to another energy level. Oct 113:07 PM Oct 113:07 PM 1 Electrons 1.notebook November 13, 2012 5.1 Levels Atomic Orbitals An atomic orbital is often thought of as a region of space in which there is a high probability of finding an electron. Each energy sublevel corresponds to an orbital of a different shape, which describes where the electron is likely to be found. Sublevels Orbitals Oct 113:10 PM 5.1 Atomic Orbitals Different atomic orbitals are denoted by letters. The s orbitals are spherical, and p orbitals are dumbbell shaped. Oct 113:07 PM 5.1 Four of the five d orbitals have the same shape but different orientations in space. Oct 113:07 PM 5.1 Atomic Orbitals The numbers and kinds of atomic orbitals depend on the energy sublevel. Oct 113:07 PM Atomic Orbitals Oct 113:07 PM 5.1 Atomic Orbitals The number of electrons allowed in each of the first four energy levels are shown here. Oct 113:07 PM 2 Attachments asap1_chem05_cman0505.html ch05_sectn01_quiz.qtb
