Explain the following terms : (a) Chemistry of all Lanthanoids is so identical . (b) Silver atom has completely filled d- orbitals `(4d^(10))` in its ground state . How can you say that is a transition elements ?

Explain the following terms : (a) Chemistry of all Lanthanoids is so i

1.	Explain the following terms : (a) Chemistry of all Lanthanoids is so identical . (b) Silver atom has completely filled d- orbitals `(4d^(10))` in its ground state . How can you say that is a transition elements ?
Answer» (a) All the lanthanoids have similar outer electronic configuration and show +3 oxidation state in their compounds . Therefore , all the Lanthanoids have similar chemical properties . The different lanthanoids differ mainly in the number of 4f-electrons which are burried deep in the atoms and hence , do not influence the properties . Moreover , due to lanthanoid contraction , there is very small difference in the size of all trivalent lanthanoid ions . Thus the size of their ions is also almost identical which resultsin similar chemical properties . (b) According to definition , transition elements are those which have partially filled d-subshell in their elementary states or in their one of the oxidation states . Silver ( Z = 47) can exhibit +2 oxidation state in which it has incompletely filled d-subshells . Hence , silver is regarded as transition element .

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Explain the following terms : (a) Chemistry of all Lanthanoids is so identical . (b) Silver atom has completely filled d- orbitals `(4d^(10))` in its ground state . How can you say that is a transition elements ?

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