1.

The atomic number of tin is 50 and chlorine is 17. What should be the shape of SnCl_(2) molecule in its vapour state?

Answer»

Solution :The electronic configuration of Sn is `1s^(2)2S^(2)2p-.^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(6)4d^(10)5s^(2)5p^(2)`and chlorine is `1s^(2)2s^(2)2p^(6)3s^(2)3p^(5)`.Hence, in `SnCl_(2)` molecule in vapour state, there is ONE lone pair of electrons and two BOND pairs of electrons in the valence shell of tin. Therefore, the expected shape is trigonal planar. But due to presence of the lone pair, its shape is bent and bond angle is `88^(@)`.


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