Electron configurations representation

The electronic configuration for an element s ground state (Table 4.1) is a shorthand representation giving the number of electrons (superscript) found in each of the allowed sublevels (s, p, d, f) above a noble gas core (indicated by brackets). In addition, values for the thermal conductivity, the electrical resistance, and the coefficient of linear thermal expansion are included. 

A complete specification of how an atom s electrons are distributed in its orbitals is called an electron configuration. There are three common ways to represent electron configurations. One is a complete specification of quantum numbers. The second is a shorthand notation from which the quantum numbers can be inferred. The third is a diagrammatic representation of orbital energy levels and their occupancy. 

A lithium atom has three electrons. The first two electrons fill lithium s lowest possible energy level, the 1. S orbital, and the third electron occupies the 2 5 orbital. The three representations for the ground-state electron configuration... 

FIGURE 3. Graphical representation of the electron configuration o of a closed-shell molecule M and of the configurations 20 of its radical cation M+ as approximations to the states and 2j (J = 1,2,3). The arrows in the representations of 22 and 23 indicate that these configurations correspond to electronic excitations of M+, relative to its ground-state configuration 2 i... 

A more detailed representation of the electron configuration of sodium is Na Is2 2s2 2p6 3s1 (subshell notation) instead of simply Na 2, 8, 1 (shell notation). 

The electron configuration of fluorine is ls22s22p5 and its orbital representation is ... 

When we look at the electron configuration of the fluorine atom, we see that it has seven valence electrons. Therefore the electron dot representation of fluorine atom is -F though it can also be represented by R, F or F ... 

Fig. 21 Schematic representation of strategies for spin alignment in D/A salts or complexes by application of spin conservation in different electron configurations of interacting molecular orbitals, (a) Typical D/A interaction between two closed-shell D and A, (b and b ) McConnell s proposal, (c) Breslow s extension, (d) Torrance s model, (e) Wudl s model, and (f) Chiang s model for further doping.

Fig. 1 (a) Schematic representation of the bonding situation in carbodiphosphoranes. (b) Schematic representation of the donor-acceptor interaction in a divalent C(0) compound CL2 between a carbon atom in the electronic D state with the electron configuration 2pJ 2s°... 

Fig. 1 Molecular orbital diagram showing the electronic configuration for the ground state (So), for the first spin-singlet excited state (Si) and for the first spin-triplet excited state (Ti). The arrows indicate the electron spin, the thin horizontal gray line is a guide to the eye. In this representation, coulomb and exchange energies are explicitly included in the positions of the frontier orbitals...

Figure 6-6 (a) Schematic representation of formation of bonding (molecular orbitals by overlap of two atomic 1s orbitals, (b) Some of the various electronic configurations that are possible with these orbitals... 

Figure 28-2 Schematic representation of the electronic configurations of ground and lowest excited singlet and triplet states of a diatomic molecule with two

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