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30 April, 01:48

Which element, represented by X, reacts with fluorine to produce the compound XF2?

(1) aluminum (3) magnesium

(2) argon (4) sodium

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  1. 30 April, 04:55
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    The answer is (3) magnesium. Aluminum usually has valence of + 3 and Sodium usually has valence of + 1. Argon is usually not react with others. Because it is already stable with 8 electrons at the outer shell.
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