Element A has an atomic number of 12; element B has an atomic number of 15. The formula of possible compound containing these elements is :

A B

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A B_{2}

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A_{2} B_{3}

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A_{3} B_{2}

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Solution

The correct option is D $A_{3} B_{2}$
$A = 12, B = 15 A c a n l o s e 2 e l e c t r o n w h i l e B c a n g a i n 3 e l e c t r o n s t o a t t a i n s t a b l e n o b l e g a s c o n f i g u r a t i o n . S o, A^{2 +} B^{3 -} s o t h e f o r m u l a i s = A_{3} B_{2}$

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