This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.

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All the electron shells (except the K shell) have several subshells. For example, L shell has three subshells, which are L_I, L_II, and L_III, and M, N, and O shells have five subshells, respectively, as shown in Figure 4677.

Figure 4677.Schematic showing electron subshells.