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Introduction to d and f Block Elements

Why do transi...

Question

Why do transition metals have high enthalpies of atomization?

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Solution

Transition elements have high effective nuclear charge and a large number of valence electrons. Therefore, they form very strong metallic bonds which results in high enthalpies of atomisation.

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Q. Why do the transition elements have higher enthalpies of atomization? In

3 d

S c

Z n

), which element has the lowest enthalpy of atomization and why?

Q. The enthalpies of atomisation of transition metal is high. Give reason.

Q. Assertion :The transition metals exhibit higher enthalpies of atomization Reason: Due to strong metallic bond strength

Q. Explain the following observations giving an appropriate reason for each.
(i) The enthalpies of atomization of transition elements are quite high.
(ii) There occurs much more frequent metal-metal bonding in compounds of heavy transition metals (i.e.

3^{r d}

M n^{2 +}

much more resistant than

F e^{2 +}

towards oxidation.

Q. Why do the transition elements have higher enthalpies of atomisation? In 3d series (Sc to Zn), which element has the lowest enthalpy of atomisation and why ?

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