Question:
Valence electrons in the element A are 3 and that in element B are 6. Most probable compound formed from A and B is
Valence electrons in the element A are 3 and that in element B are 6. Most probable compound formed from A and B is
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Use cross valency to get empirical formula quickly.
Updated On: Apr 23, 2026
- A$_2$B
- AB$_2$
- A$_6$B$_3$
- A$_2$B$_3$
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The Correct Option is D
Solution and Explanation
Concept:
Valency based on achieving octet
Step 1: Element A has 3 valence electrons → valency = 3.
Step 2: Element B has 6 valence electrons → valency = 2.
Step 3: Combine using cross valency method.
\[ A^{3+},\ B^{2-} \Rightarrow \text{Formula} = A_2B_3 \] Conclusion:
Compound formed = A$_2$B$_3$
Step 1: Element A has 3 valence electrons → valency = 3.
Step 2: Element B has 6 valence electrons → valency = 2.
Step 3: Combine using cross valency method.
\[ A^{3+},\ B^{2-} \Rightarrow \text{Formula} = A_2B_3 \] Conclusion:
Compound formed = A$_2$B$_3$
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