Explain why transition metals form complex compounds.

Q. Why chromium has electronic configuration $3d^{5}4s^1$ and not $3d^{4}4s^2$?
Transition metals form complex compounds :

Q. Explain:
(i) Transition elements mostly form the complex compound. Why?
(ii) Transition elements are good catalyst. Why?
(iii) Transition elements show variable valency. Why?

Q.

Explain giving reasons :
Transition metals and many of their compounds show paramagnetic behaviour.

The enthalpies of atomisation of the transition metals are high.

The transition metals generally form coloured compounds.

Transition metals and their many compounds act as good catalyst.

Q.

Explain giving reasons:

(i) Transition metals and many of their compounds show paramagnetic

behaviour.

(ii) The enthalpies of atomisation of the transition metals are high.

(iii) The transition metals generally form coloured compounds.

(iv) Transition metals and their many compounds act as good catalyst.

Q. Explain the following:
$\left(i\right)$ Why do transition metal ions possess a great tendency to form complexes?
$\left(ii\right)$ The paramagnetic character in $3d$-transition series elements increases upto $Mn$ and then decreases.