the observed electronic configuration of platinum (Z=78) is [Xe] 4f14 5d9 6s1. It has one unpaired electron in its d-orbital and one unpaired electron in its s-orbital. Those elements with such configuration are generally very reactive(SODIUM has one unpaired electron, which is donated by it to reach the nearest noble gas configuration). Platinum is called a NOBLE METAL and it is so stable. HOW IS THIS STABILITY ACHIEVED WITH SUCH A CONFIGURATION. Also,please explain how does platinum prefer this configuration over the expected electronic configuration [Xe] 4f14 5d8?

Asked by Renuka Ganesh | 9th Jul, 2013, 07:12: PM

Expert Answer:

The afore mentioned configuration is in accordance with the poor shielding effect of the inner f orbitals causing Lanthanide contraction, in the transistion elements.(pt)
 
Sodium on the other hand is a s - block element without the d - orbitals being involved it stabilises itself by losimg an electron.

Answered by  | 10th Jul, 2013, 12:47: AM

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