In any transition series, as we move from 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?
A
La
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B
W
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C
Os
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D
Pt
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Solution
The correct option is AW W has a melting point of 3410∘C. The d shell is complete, and d electrons do not participate in the metallic bonding.