CBSE Class 12-science Answered
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 | 09 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 | 10 Jul, 2013, 12:47: AM
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