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Chemistry

Elements A & B have electronic configuration : 8 & 13 respectively. The chemical formula formed between A & B will be:

  1. AB
  2. B3A3
  3. A2B3
  4. B2A3

Periodic Table

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Answer

B2A3

Reason

Electronic configuration of Element A : 8 — 2, 6
Electronic configuration of Element B : 13 — 2, 8, 3

Valency of element A : 2
Valency of element B : 3

Formula of the compound formed by the combination of A and B:

B33  A2B22 A33B2A3\overset{\phantom{3}{3}}{\text{B}} \space {\swarrow}\mathllap{\searrow} \space \overset{2}{\text{A}} \Rightarrow \underset{\phantom{2}{2}}{\text{B}} \space {\swarrow}\mathllap{\searrow} \underset{\phantom{3}{3}}{\text{A}} \\[1em] \text{B}2\text{A}3

∴ Formula of the compound is B2A3

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