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Quantum Numbers

Two elements,...

Question

Two elements, $X$ and $Y$ , have atomic numbers $33$ and $17$ respectively. The molecular formula of a stable compound formed between then is:

A

X Y

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B

X Y_{2}

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C

X Y_{3}

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D

X Y_{4}

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Solution

The correct option is C $X Y_{3}$
$_{33} A s : 5 e^{-}$ electrons in valence shell
$_{17} C l : 7 e^{-}$ electrons in valence shell

Compound formed will by $A s C l_{3} i . e . X Y_{3}$

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