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Elements X and Y have electronic configurations 1s22s22p6 and 1s22s22p63s23p1 ...

Elements X and Y have electronic configurations 1s22s22p6 and 1s22s22p63s23p1 respectively. When they combine, the formula of the compound formed is
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  • A XY
  • B YX
  • C X2Y3
  • D Y2X3
Correct Answer: Option D
Explanation:
\(\frac{\text{Element X}}{1s^22s^21p^4}\)
Valency of X is 2
\(\frac{\text{Element Y}}{1s^22s^22p^63s^23P^1}\)
valency of Y is 3
There is an exchange of valency when a compound is being formed. Hence, we have Y2X3

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