Step 1: Understanding the Concept:
The melting points of transition metals are high due to strong metallic bonding arising from the involvement of (n-1)d electrons.
Step 2: Detailed Explanation:
Among the first transition series (Sc to Zn), the melting points increase up to the middle and then decrease. Chromium (Cr) has the highest melting point of 2180 K. This is because it has an exceptional electronic configuration (\(3d^5 4s^1\)) with five unpaired electrons, leading to very strong interatomic bonding.
Step 3: Final Answer:
Chromium has the highest melting point among the first transition series metals.