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Question

The elements of the three transition series of the d - block are given below:
ScTiVCrMnFeCoNiCuZnYZrNbMoTcRuRhRdAgCdLaHfTaWReOsIrPtAuHg
In any transition series, as we move form left to right, the d - orbitals are progressively filled and their properties vary accordingly.
Which element do you expect to have the highest melting point?


Your Answer
A
La
Correct Answer
B
W
Your Answer
C
Os
Your Answer
D
Pt

Solution

The correct option is B W
Look for the one having the strongest metallic bonding. Again, this is a function of the number of unpaired electrons! W tops the list here and thus has the highest melting point. 

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