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

$\huge \bold{ \sf Answers}$

1》 d-Block Elements have high density because they have small size high atomic mass and close packing of particles.

2》 d-Block Elements have high enthalpy of atomisation due to unpaired electrons stronger metallic bonding.

3》 Due to strong metallic bonding d-Block Elements have high melting point

4》 Due to smaller size high effective nuclear charge .

5》 Due to unpaired electron and d-d transition.

Answer 2

See Here

1) small size and close packing of particles.

2) Strong metallic bonding.

3) Strong metallic bonding

4) high effective nuclear charge .

5) unpaired electron and d-d transition.