Question

In the formation of compound between two atoms A and B. A losses two electron B gain one electrons.i) what is the nature of bond A and B.ii) Suggest the formula of the compound formed between A and B.iii) On similar line explain the formation Mgcl2

Answer 1

Heya friend!!
A loses Two electrons, so it is a metal and forms a positively charged ion.
B gains an electron, so it is a non metal and forms negatively charged ion.

Now, a bond between a metal and non metal is always ionic.
I) So nature of bond is ionic or electrovalent.

ii) Since A loses 2 electrons, its valency is +2 and valency of B is -1 since it gains one electron. On interchanging them, we get the formula, which is AB2.

iii) Mg is a metal which has two electrons in the outermost shell..so to form a cation, it needs to donate the two electrons to chlorine, which has one electron short of octet. Thus, The two donated electrons of magnesium and accepted by two chlorine atoms (one each).

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Answer 2

Here is the answer . Please refer to it