The outer electronic configuration of copper is 3d10 4s1, yet it is considered transition element. Why?
copper displays two oxidation states (+1 and +2). In the +1 oxidation state, an electron is removed from the s-orbital. However, in the +2 oxidation state, an electron is removed from the d-orbital. Thus, the d-orbital now becomes incomplete (3d9). Hence, it is a transition element. wherein it will have incompletely filled d-orbitals (4d), hence a transition metal.
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12.Why the melting points of transition elements are high?
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13.Why Zn, Cd and Hg are not regarded as transition elements?
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14.
Name the first element of 3rd transition series.
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15.
Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?
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16.Why are transition elements so named?
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17.Why are transition elements known as d-block elements?
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18.Write the general electronic configuration of d-block elements.
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19.Why do some exceptions to the general electronic configuration of d-block elements exists?
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