Term symbols ground state

The term symbol summarizes the properties of any state and also permits a concise representation of spectral transitions. It consists of an upper case letter (S, P, D. ..) to represent the net orbital angular momentum (L) and a number written as a superscript on the upper left to indicate spin multiplicity (i. e. the number of possible orientations of total spin of the atom). L is zero for Fe " (no angular momentum) and 2 for Fe ". The spin multiplicity is defined as (2S -i- 1) S = 5/2 and 2 for Fe " and Fe ", respectively. The ground state term symbol for Fe " is, therefore, 85 2 and for Fe " it is 04. The subscript on the right is the value J. 

Determine the ground state term symbols for each of the ions m Problem 2.16. 

Table 18.1.4. Electronic configuration, ground state term symbol, and magnetic properties of Ln3+ ions...

Metal ion Colour Ground state electronic configuration Ground state term symbol Magnetic moment, p (298 K) / p Calculated Observed ... 

Figure SI A The derivation of ground-state term symbols for (a) and (b) p electron configurations...

The term symbols for a variety of possible electron configurations are shown in Table 4.3. For each entry, the ground-state term symbol is listed first. Note that the completely filled subshells s, p, and are all spherically symmetric, as required by Unsold s theorem and have the Sterm. Half-filled subshells (such as ord are also spherically symmetric. The term symbols for the pairs p and p, p and p", and d , and so on, are identical to one another because the p electron configuration, for instance, can be viewed equivalently as a p (hole) configuration. 

Determine the term symbols for the N atom. Show all work, (a) Determine the number of possible microstates, (b) Write out all the possible combinations of the electrons in a microstates table, (c) Extract the term symbols and determine the degeneracy of each term, (d) Determine the ground-state term symbol using Hund s rule of maximum multiplicity. 

Write the ground-state term symbols (in the form Lj) for each of the following gas-phase ions and then calculate the predicted effective magnetic moment in units of Bohr magnetons ... 

The ground-state term symbol is always listed first. 

TABLE 16.22 Ground-state term symbols for the different d" configurations in an octahedral LF and in a tetrahedral LF. electron... 

The Tanabe-Sugano diagram for a d ion is shown in Figure 17.27. For the HS complex at 293 K, the ground-state term symbol is Tjg and there is only one spin-allowed transition (to the Eg ES). The GS term symbol for LS Fe(ll) is A g and several spin-allowed transitions to low-lying excited states are possible. The absorption bands for [Fe(ptz)g](BF4)2 at 293 K and at 20 K are listed in Table 17.19 along with their assigned electronic transitions. 

Ground-state term symbol is shown in parantheses. 

Assume that Li follows the line for N2 in the correlation diagram. Write the MO configuration for the groimd state of Li, and the ground state term symbol. 

If the molecular ion BH has the ground MO configuration (la ) (2a ) (le ), what is its ground state term symbol The molecule is planar, and all three hydrogens are equivalent. 

Predict the ground state term symbol for each of the following atoms. 

Predict the ground-state term symbol for the tetravalent cation of manganese, Mn. Assume that its electron configuration has a d valence subshell. Use Table 15.1 for... 

Assuming that the Russell-Saunders system applies, determine the term symbols and which is the ground-state term symbol for a hypothetical element having an electron subshell configuration for its ground state. 

The Co + ion has a d electron configuration and a ground-state term symbol of Fg/2. List the possible term symbols for excited states that will participate in allowed transitions. 

Determine the ground-state term symbol of the acetylide ion,. Use the molecular orbital diagram for oxygen for assistance. 

Electronic configuration in the ground state Term symbol in the ground (Nel 3 y... 

Excited states are represented in the LCAOMO approximation by electron configurations other than that of the ground state. Term symbols can be written for an excited electron configuration. 

---