What is the chemical formula of the compound formed when 2311X combines with 199Y?
A
XY
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B
X2Y
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C
XY2
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D
X2Y3
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Solution
The correct option is A XY As we can see that, X have atomic no 11 so it have 1 valence electron and it will form X+ Similarly Y have 7 valence electron so it will form Y−. So they will form XY compound.