Pseudo-Noble Gas Configurations: A Unique Path to Atomic Stability

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Here, we are going to explain the pseudo-noble gas configuration of an element.

A noble gas configuration is defined as the arrangement of electrons of an element or ion that has completely filled valence orbitals. Therefore, it has attained the “octet” state which is highly stable.

For example: There are some elements which are stable before attaining any noble gas configuration.

Let us consider an element like Sn(tin) having electronic configuration \([\mathrm{Kr}] 4 \mathrm{~d}^{10} 5 \mathrm{~s}^{2} 5 \mathrm{p}^{2}\)

When Sn loses 4 electrons, \(\mathrm{Sn} \rightarrow \mathrm{Sn}^{4+}+4 \mathrm{e}^{-}\)

The electronic configuration of \(\mathrm{Sn}^{4+}\) would be \([\mathrm{Kr}] 4 \mathrm{~d}^{10}\)  and it is stable state.

Thus, the element which have fully filled d orbitals \((\mathrm{n}-1) \ \mathrm{d}^{10}\)  and the configuration is not same with the noble gas configuration, then it is called a pseudo-noble gas configuration.