which of the following has highest melting point-Ni, Fe, Pt
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Answered by
25
Pt-1768 C
Fe-1538 C
Ni-1455 C
Fe-1538 C
Ni-1455 C
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Melting point of Nickel (Ni)= 1455°C
Melting point of Iron (Fe) = 1538°C
Melting point of Platinum (Pt)=1768°C
Melting point: Platinum>Iron>Nickel
Melting point ∝ Bond enthalpy and intermolecular forces [here metallic bond]
# Platinum is a highly dense element ,platinum can have a maximum of 4 delocalised e⁻,which give it the strongest metallic bond,leading to its highest melting point,compared to others.
# Iron form stronger metallic bond than that formed by nickel,because Fe³⁺ have 3 delocalised e⁻ and Ni²⁺ have 2 delocalised e⁻.
NOTE:
Higher the number of delocalised e⁻,Stronger is the metallic bond. Higher is the melting point.
Melting point of Iron (Fe) = 1538°C
Melting point of Platinum (Pt)=1768°C
Melting point: Platinum>Iron>Nickel
Melting point ∝ Bond enthalpy and intermolecular forces [here metallic bond]
# Platinum is a highly dense element ,platinum can have a maximum of 4 delocalised e⁻,which give it the strongest metallic bond,leading to its highest melting point,compared to others.
# Iron form stronger metallic bond than that formed by nickel,because Fe³⁺ have 3 delocalised e⁻ and Ni²⁺ have 2 delocalised e⁻.
NOTE:
Higher the number of delocalised e⁻,Stronger is the metallic bond. Higher is the melting point.
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