silver(Ag) has a fully filled d orbital. then why is it called a transition element?

Asked by vaishanavi | 19th Oct, 2013, 08:56: PM

Expert Answer:

The term transition element, as defined by IUPAC, is the one with a partly filled d orbitals in its ground state or in any of its oxidation state. This definition justifies the inclusion of Cu, Ag and Au as transition metals, since Cu(II) has a 3d9 configuration, Ag(II) has a 4d9 and Au(III) has a 5d8 configuration. By this definition, Zn, Cd and Hg are excluded from transition metals, as they have d10 configuration. However, being the end members of the series, they are often considered together with the transition elements.

Answered by  | 28th Oct, 2013, 02:01: PM

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