Chapter 8. Electron Configuration and Periodicity. Overview. Electron Structure of Atoms Electron spin and the Pauli Exclusion Principle. Aufbau Principle and the Periodic Table Electron Configuration Orbital Diagram of atoms; Hund’s Rule Periodicity of the Elements
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Electron Configuration and Periodicity
3s 3p 3d
4s 4p 4d 4f
5s 5p 5d 5f
6s 6p 6d 6fDiagonal Rule for Build-up Rule
E.g. Determine the electron configurations of H and He
E.g. 2 Determine the electron configuration of the second row elements.
E.g.3 Determine the electron configuration of the 4th row elements.
E.g. The alkali metals will lose a single electron to become M+. The electron configuration is [He], [Ne], [Ar], [Kr], and [Xe] for Li+, Na+, K+, Rb+ respectively.
E.g. [Ar]4s13d94p1 is an excited-state electron configuration for Cu.
Fig. 8.17 Atomic Radii for Main Group Elements
E.g. Predict which of the following substances has the largest radius: P3, S2, Cl, Ar, K+, Ca2+.
Fig. 8.18 Ionization Energy vs atomic #
E.g. Cl + e Cl Eea = 348.6 kJ/mol
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