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Chemical Bonding — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryChemical Bonding3 Marks
Question
Element $X$ is a metal with a valency $2$. Element $Y$ is a non metal with a valency $3.$
(a) Write equations to show how $X$ and $Y$ form ions.
(b) If $Y$ is a diatomic gas, write the equation for the direct combination of $X$ and $Y$ to form a compound.
✓

Answer

(a) For element X :
$X \rightarrow X^2 + 2e^-$​​​​​​​
For element Y :
$Y + 3e^- \rightarrow Y^{3-}​​​​​​​$​​​​​​​
(b) Since Y is a diatomic gas hence it combines with X as :
$3X + Y_2\rightarrow X_3Y_2​​​​​​​$​​​​​​​

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