Explain why chromium has a higher melting point than scandium or zinc.

• A. Cr has a higher melting point than Sc or Zn because Cr has more unpaired electrons in its d-orbital. 
• B. Cr has a higher melting point than Sc or Zn because Cr has fewer unpaired electrons in its d-orbital.
• C. Cr has a higher melting point than Sc or Zn because Cr has a smaller atomic radius.
• D. Cr has a higher melting point than Sc or Zn because Cr has a larger atomic radius. 

Answer: (A)