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प्रश्न
Transition metals show high melting points why?
उत्तर
- All the transition metals are hard.
- Most of them are hexagonal close-packed, cubic close-packed (or) body-centered cubic, which are characteristics of true metals.
- The maximum melting point at about the middle of the transition metal series indicates that the d5 configuration is favourable for strong inter-atomic attraction.
- Due to the strong metallic bonds, the atoms of the transition elements are closely packed and held together. This leads to a high melting point and boiling point.
संबंधित प्रश्न
Which one of the following ions has the same number of unpaired electrons as present in V3+?
The magnetic moment of Mn2+ ion is ____________.
The catalytic behaviour of transition metals and their compounds is ascribed mainly due to ____________.
The correct order of increasing oxidizing power in the series
Complete the following.
\[\ce{MnO^2-_4 + H^+ ->?}\]
Calculate the number of unpaired electrons in Ti3+, Mn2+ and calculate the spin only magnetic moment.
Explain the variation in `"E"_ ("M"^(3+)//"M"^(2+))^0` 3d series.
Compare the ionization enthalpies of the first series of the transition elements.
The `"E"_("M"^(2+)//"M")^0` value for copper is positive. Suggest a possible reason for this.
Why first ionization enthalpy of chromium is lower than that of zinc?
