Grade 11Inorganic Chemistry
what are the propreties of s block elements , p block elements , d block elements , f block elements
what are the propreties of s block elements , p block elements , d block elements , f block elements
1 Answer
Arun
Properties of s-Block elements (contain s-electrons in their valence shell)
Except H all elements of s-Block elements are active metals.
They have +1/ +2 oxidation state.
They form basic oxides
They impart characteristic colour to the flame
Generally they form ionic salts with nonmetals.
They have low ionization potentials.
They have very small electron gain enthalpies.
They are solids at room temperature (Cs is liquid at about at 35oC)
Their hydroxides are basic in nature.
Properties of p-Block elements: (contain p-electrons in their valence shell)
Most of p-Block elements are non-metals.
They have variable oxidation states.
They form acidic oxides
They impart no characteristic colour to the flame
Generally they form covalent compounds. Halogens form salts with alkali metals
They have high ionization potentials.
They have very large electron gain enthalpies.
They are solids/liquids/gases at room temperature (Br is liquid)
The aqueous solutions their oxides are acidic in nature.
Properties of d-Block elements: (contain d-electrons in their valence shell).
These elements lie in between s-block and p-block elements. These elements are called transition elements as they show transitional properties between s and p-block elements. The general electronic configuration of d-block elements is (n-1)d1-10ns0-2.
Most of the d-block elements are metals.
Most of them exhibit variable oxidation states because of the presence of partly filled d-orbitals. (Except Sc, Zn, Cd etc.)
Many of their compounds are coloured.
They readily form complexes by acting as Lewis acids. They easily form complexes (coloured). Most of them and their compounds show paramagnetic, ferromagnetic behaviour. They act as good catalysts.
Properties of f-Block elements: (contain f-electrons in their valence shell).
Electronic configuration: ns2 (n-) d0-1(n-2) f1-14
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