1.

(a) Explain the magnetic behaviour of transition metals. (b) Write the electronic configuration of Ni(28), Zn(30).

Answer»

Solution : Most of the d-block elements and their COMPOUNDS are attracted by a magnet. This MEANS that these are paramagnetic in nature. This property is due to the unpaired electrons present in their (n-1) d-orbitals. The more the number of unpaired electrons, the more will be magnetic character. If there are no unpaired electrons, the substance will be diamagnetic e.g. Zn, Cd, Hg etc.
(B) `Ni_(28): 1s^(2)2s^(2) 2p^(6)3s^(2)3p^(6)4s^(2)3d^(8)`
`Zn_(30): 1s^(2)2s^(2) 2p^(6)3s^(2)3p^(6)4s^(2)3d^(10)`


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