What is the reason for this?????
Dear Student,
In general melting pooint increases across the group in transition metal, but in Mn the bonding character is affected by half-filled d-orbital, increased shielding-effect from nuclei resulting in lowered melting point.
Note: More unpaired electron results in forming stronger bonds resulting in higher melting point, hence orbital filling plays a vital role in determination of melting point.
Regards.
In general melting pooint increases across the group in transition metal, but in Mn the bonding character is affected by half-filled d-orbital, increased shielding-effect from nuclei resulting in lowered melting point.
Note: More unpaired electron results in forming stronger bonds resulting in higher melting point, hence orbital filling plays a vital role in determination of melting point.
Regards.