Question
Give the electronic configuration of the transition elements. Write their four important characteristics.

Answer

General electronic configuration of Transition elements:
The d-block elements are known as transition elements with general outer electronic configuration as $( n -1) d ^{1-10} ns^{0-2}$.
Characteristics of d-block elements:
(i) They show variable oxidation states.
(ii) Their compounds are generally paramagnetic in nature.
(iii) Most of the transition elements form coloured compounds
(iv) They are all metals with high melting and boiling points.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Calculate the total number of electrons present in $1.6g$ of methane.
For the reaction, $2 A( g )+ B ( g ) \longrightarrow 2 D ( g ) ; \Delta U^o=-10.5 kJ$ and $\Delta S^o=-44.1 JK ^{-1}$. Calculate $\Delta G^o$ for the reaction and predict whether the reaction may occur spontaneously. $\left( R =8.314 \times 10^{-3} kJ K ^{-1} mol^{-1}, T=298 K\right)$
Using molecular orbital theory, compare the bond energy and magnetic character of $\mathrm{O}_2^{+}$and $\mathrm{O}_2^{-}$.
Describe the following in brief:
  1. Ozone depletion over Antarctica (Ozone hole) (do not write reaction).
  2. COD.
  3. Fluoride in tooth paste protects teeth against decay.
A transluscent white waxy solid (A) on heating in inert atmosphere is converted into its allotropic form ' B '. Allotrope ' A ', on reaction with very dilute aqueous solution of KOH liberates highly poisonous gas (C) having rotten fish smell. With excess of chlorine (C) forms (D) which hydrolyse to a compound 'E'. Identify A to E giving chemical equations.
The average molar mass of a mixture of methane ($CH_4$) and ethane ($C_2H_4$​​​​​​​) present in the ratio of a : b is found to be 20.0g $mol^{-1}​​​​​​​$​​​​​​​. If the ratio were reversed, what would be the molar mass of the mixture?
Describe the industrial use of hydrogen which depends on
  1. the heat liberated when it burns.
  2. its ability to react with vegetable oil in the presence of a catalyst.
  3. its ability to unite with $\mathrm{N}_2$.
What could be the harmful effects of improper management of industrial and domestic solid waste in a city?
$BCl _3$ is trigonal planar while $AlCl _3$ is tetrahedral in dimeric state. Explain.
OR
$BCl _3$ exists as monomer whereas $AlCl _3$ is dimerised through halogen bridging. Give reason. Explain the structure of the dimer of $AlCl _3$ also.
Find out the value of $\text{K}_{\text{c}}$ for each of the following equilibria from the value of $\text{K}_{\text{p}}$:
$2\text{NOCl (g)}\rightleftharpoons2\text{NO (g) + Cl}_2\text{ (g)};\text{ k}_{\text{p}}=1.8\times10^{-2}\text{ at }500\text{K}$