Question
Why the tansition elements are hard and have high melting and boiling points?
✓
Answer
→ The high melting points of these metals are attributed to the involvement of greater number of electrons from (n-1)d in addition to the ns electrons in the interatomic metallic bonding.
→ In any row the melting points of these metals rise to a maximum at d5 except for anomalous values of Mn and Te and fall regularly as the atomic number increases.
Trends in melting points of transition elements
→ Zn, Cd, and Hg are soft and volatile and they have low melting point because all these elements have no unpaired electrons.
→ In any row the melting points of these metals rise to a maximum at d5 except for anomalous values of Mn and Te and fall regularly as the atomic number increases.
Trends in melting points of transition elements
→ Zn, Cd, and Hg are soft and volatile and they have low melting point because all these elements have no unpaired electrons.
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