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(a) In the formation of compound between...

(a) In the formation of compound between two atoms A and B, A loses two electrons and B gains one electron.
(i) What is the nature of bond between A and B?
(ii) Suggest the formula of the compound formed between A and B.
(b) On similar lines explain the formation of `MgCl_(2)` molecule.
(c ) Common salt conducts electricity only in the molten state. Why?
(d) Why is melting point of NaCl high ?

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