Unit 8 The D And F Block Elements (Intext Questions-1)
Intext Question
8.1 Silver atom has completely filled $d$ orbitals $\left(4 d^{10}\right)$ in its ground state. How can you say that it is a transition element?
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Answer
Ag has a completely filled $4 d$ orbital $\left(4 d^{10} 5 s^{1}\right)$ in its ground state. Now, silver displays two oxidation states (+1 and +2 ). In the +1 oxidation state, an electron is removed from the $s$-orboital. However, in the +2 oxidation state, an electron is removed from the $d$-orbital. Thus, the $d$-orbital now becomes incomplete $\left(4 d^{9}\right)$. Hence, it is a transition element.
