Question

#Chemistry For Mods And Stars .
$\large \sf Questions$
1) Why d-Block Elements have high density ?

2) Why d-Block Elements have high enthalpy of Atomization ?

3) Why d-Block Elements have high melting point .

4) For Copper(Cu) +1 is less stable than +2 , Why?

5) Why d-Block Elements form coloured ion and coloured compounds ? ​

Answer 1

Here is your answer dear⛄

❥ $\huge\underline\red{ ~①~ AnSwEr ~ :- }$

• d-block elements have high density because of the filling of (n-1) d orbital that cause an increase in nuclear charge and pulls the electron inward.
• This result in decrease in atomic radii and increase in atomic density of elements.

❥ $\huge\underline\blue{ ~②~ AnSwEr ~ :- }$

• d-block elements exhibit higher enthalpy of atomisation because the atoms are closely packed and held together by strong metallic bonds.

❥ $\huge\underline\pink{ ~③~ AnSwEr ~ :- }$

• d-block metals are attributed to the involvement of greater number of electrons from (n-1) d in addition to the ns electrons in the interatomic metallic bonding.

❥ $\huge\underline\green{ ~④~ AnSwEr ~ :- }$

• The ${Cu}^{+2}$ ion has a greater charge density than ${Cu}^{+1}$ ion and thus forms much stronger bonds releasing more energy.

❥ $\huge\underline\orange{ ~⑤~ AnSwEr ~ :- }$

• Whenever light falls on the d-block elements compounds , electrons excite and electrons absorb energy and excite.
• When these electrons de-excite they release visible light wavelength.
• So, the d-block elements compounds exhibit colour.

$\huge\colorbox{cyan}{MysticalGiggles}$