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Explain d-block elements of periodic table. |
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Answer» Solution :"Elements of group 3 to 12 are known as d-block elements." General electronic configuration of these elements are `(n -1) d^(1-10) ns^(0-2)`. These elements are known as d-block elements because their last electron is filled in d-orbital. Characteristic of d-block elements : They are all metals. They mostly form coloured ions, exhibit variable valence (oxidation states), PARAMAGNETISM and oftenly used as CATALYSTS. However, Zn, Cd and HG which have the electronic configuration, (n - 1) `d^(10) ns^(2)`do not show most of the properties of transition elements. Transition Elements : In a WAY, transition metals form a bridge between the chemically active metals of s-block elements and the LESS active elements of Groups 13 and 14 and thus take their familiar name "Transition Elements". |
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