Pseudo-noble gas configuration

Mercury, with filled 5d and 6s subshells, also has the pseudo noble gas configuration. In the gas phase, Hg exists as a monatomic molecule. From Fig. 2.4.1, Hg has an I value similar to those of noble gases it occupies a maximum position in the h curve. The interaction between mercury atoms is of the van der Waals type. Hence, Hg and Au have some notably different properties ... 

I) those with a noble gas conhguration such as Be- (2) those with a pseudo-noble gas configuration (/i - )il %.i%p. such as Zn- and Ca and (3) those transition metal ions which do not strongly favor other structures by virtue of the LFSE, such as Co, t/ . 

Orbital notation provides a convenient way to visualize the loss or gain of valence electrons. When zinc metal reacts with sulfuric acid, the zinc forms a Zn + ion with a pseudo-noble gas configuration. 

What is a pseudo-noble gas configuration Give an example of one ion from Group 3A( 13) that has it. 

Figure 7.3 When zinc reacts with iodine, the heat of the reaction causes solid iodine to sublimate into a purple vapor. At the bottom of the tube, Znl2 is formed containing Zn + ions with a pseudo-noble gas configuration. 

When the two 4s valence electrons are lost, a stable pseudo-noble gas configuration consisting of filled s, p, and d sublevels is achieved. Note that the filled 3s and 3p orbitals exist as part of the [Ar] configuration. 

Pseudo-noble gas configuration. If the metal atom empties its highest energy level, it attains the stability of empty ns and np sublevels and filled inner (n — l)d sub-level. This (n — )d ° configuration is called a pseudo-noble gas configuration. For example, tin (Sn Z = 50) loses four electrons to form the tin(rV) ion (Sn" " ), which has empty 5s and 5p sublevels and a filled inner Ad sublevel ... 

Cations of Groups lA to IIIA having noble-gas or pseudo-noble-gas configurations. The ion charges equal the group numbers. 

A noble gas core with an outer d configuration is known as a pseudo-noble gas configuration. A d cation is stable because the third shell is completely filled with 18 electrons, with 10 electrons in the d sub-shell. 

---