Question:
Identify the element of first transition series that has the highest melting point.
Identify the element of first transition series that has the highest melting point.
Show Hint
Melting point rises to a maximum near the d5 arrangement where the most unpaired electrons take part in bonding.
Updated On: Nov 12, 2026
- Vanadium
- Chromium
- Manganese
- Iron
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Transition metals melt at high temperatures because both the (n-1)d and ns electrons take part in metallic bonding.
More unpaired d electrons mean stronger metallic bonds.
Step 2: Trend across the series
Across the first series the melting point rises to a maximum near the \(d^{5}\) configuration and then falls as the electrons start to pair up.
Step 3: Compare the metals
Chromium, \([\text{Ar}]\,3d^{5}4s^{1}\), has six unpaired electrons, which is more than V, Mn or Fe.
Manganese has an unusually low melting point because of its stable half-filled 4s and 3d arrangement.
Step 4: Conclusion
So chromium has the highest melting point among the given elements.
Final Answer:
Chromium has the highest melting point in the first transition series among the options. \[ \boxed{\text{(B) }\text{Chromium}} \]
Transition metals melt at high temperatures because both the (n-1)d and ns electrons take part in metallic bonding.
More unpaired d electrons mean stronger metallic bonds.
Step 2: Trend across the series
Across the first series the melting point rises to a maximum near the \(d^{5}\) configuration and then falls as the electrons start to pair up.
Step 3: Compare the metals
Chromium, \([\text{Ar}]\,3d^{5}4s^{1}\), has six unpaired electrons, which is more than V, Mn or Fe.
Manganese has an unusually low melting point because of its stable half-filled 4s and 3d arrangement.
Step 4: Conclusion
So chromium has the highest melting point among the given elements.
Final Answer:
Chromium has the highest melting point in the first transition series among the options. \[ \boxed{\text{(B) }\text{Chromium}} \]
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