Actinoids – Properties and Uses
Actinoids
The 14 elements immediately following actinium (89), with atomic numbers 90 (Thorium) to 103 (Lawrencium) are called actinoids. They belong to second inner transition...
Inner Transition elements (f- Block) Introduction and Lanthanoids
Inner Transition elements (f- Block) Introduction
The elements in which the differentiating electron enters the penultimate energy level i.e. (n−2)f, are called f-block elements. Due...
Potassium Permanganate, KMnO4
Potassium Permanganate, KMnO4
Preparation of Potassium Permanganate:
It is prepared by fusion of MnO4 with alkali metal hydroxide (KOH) in presence of O2 or oxidising agent...
Potassium dichromate, K2Cr2O7
Potassium dichromate, K2Cr2O7
Preparation of Potassium dichromate:
It is prepared by fusion of chromate ore (FeCr2O4) with sodium carbonate in excess of air.
Na2CrO4 produced in the...
Formation of oxides of d-block elements
Formation of oxides of d-block elements
Transition metals form oxides on reaction with oxygen at elevated temperature. Transition metal form oxide in oxidation state of...
Alloy Formation in d-block elements
Alloy Formation in d-block elements
Alloys are homogeneous solid solutions of two or more metals obtained by melting the components and then cooling the...
Formation of Coloured Ions & Catalytic Properties of d-block elements
Formation of Coloured Ions:
When an electron from a lower energy d orbital is excited to a higher energy d orbital, the energy of excitation...
Chemical Reactivity and E0 Values
Chemical Reactivity and E0 Values:
The transition metals vary very widely in their chemical reactivity. Some of them are highly electropositive and dissolve in mineral...
Different Trends in d-block elements
Trends in the M2+/M Standard Electrode Potentials
There is no regular trend in the E0 (Mn2+/M) values. This is because their ionization enthalpies (I1...
d-Block elements- Introduction
“The elements in which the last differentiating electron enters into the d-orbitals of the penultimate shell i.e. (n–1) d where n is the last...