The electronic configuration of the elements A and B are 1s2, 2s2, 2p6, 3s2, and 1s2, 2s2, 2p5, respectively. The formula of ionic compound that can be formed between these elements is ..........?
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Answer:
written below-
Explanation:
The first element A, has 2 electrons in it's outermost shell, thus it valency is 2.
The second element B, has 7 electrons in it's outermost shell, thus it's valency is 1.
Thus theformula of the ionic compound formed by these atoms is AB2.
Hope this helps, inform if wrong.
Btw, the elements are Mg and F respectively.
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