Elements X and Y form an ionic compound. Name the compound formed by X and Y.
(Atomic number of X is 11 and Y is 9)

Sodium fluoride

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Magnesium oxide

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Sodium chloride

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Magnesium fluoride

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Solution

The correct option is A
Sodium fluoride

The atomic number of X is 11.
Electronic configuration of X is: 2,8,1
Therefore, element X is sodium.

The atomic number of Y is 9.
Electronic configuration of Y is: 2,7
Therefore, element Y is fluorine.
X loses one electron and Y gains one electron forming an ionic compound. Therefore, the compound formed by X and Y is sodium fluoride (NaF).

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Elements X and Y form an ionic compound. Name the compound formed by X and Y. (Atomic number of X is 11 and Y is 9)

Elements X and Y form an ionic compound. Name the compound formed by X and Y.
(Atomic number of X is 11 and Y is 9)